    {-# LANGUAGE TypeApplications #-}

    -- | Copyright  : Will Thompson and Iñaki García Etxebarria
    -- License    : LGPL-2.1
    -- Maintainer : Iñaki García Etxebarria
    --
    -- Font-wide extent values, measured in scaled units.
    --
    -- Note that typically /@ascender@/ is positive and /@descender@/
    -- negative, in coordinate systems that grow up.

    #if !defined(__HADDOCK_VERSION__)
    #define ENABLE_OVERLOADING
    #endif

    module GI.HarfBuzz.Structs.FontExtentsT
        (

    -- * Exported types
        FontExtentsT(..)                        ,
        newZeroFontExtentsT                     ,

     -- * Methods

    #if defined(ENABLE_OVERLOADING)
        ResolveFontExtentsTMethod               ,
    #endif

     -- * Properties

    -- ** ascender #attr:ascender#
    -- | The height of typographic ascenders.

    #if defined(ENABLE_OVERLOADING)
        fontExtentsT_ascender                   ,
    #endif
        getFontExtentsTAscender                 ,
        setFontExtentsTAscender                 ,

    -- ** descender #attr:descender#
    -- | The depth of typographic descenders.

    #if defined(ENABLE_OVERLOADING)
        fontExtentsT_descender                  ,
    #endif
        getFontExtentsTDescender                ,
        setFontExtentsTDescender                ,

    -- ** lineGap #attr:lineGap#
    -- | The suggested line-spacing gap.

    #if defined(ENABLE_OVERLOADING)
        fontExtentsT_lineGap                    ,
    #endif
        getFontExtentsTLineGap                  ,
        setFontExtentsTLineGap                  ,

        ) where

    import Data.GI.Base.ShortPrelude
    import qualified Data.GI.Base.ShortPrelude as SP
    import qualified Data.GI.Base.Overloading as O
    import qualified Prelude as P

    import qualified Data.GI.Base.Attributes as GI.Attributes
    import qualified Data.GI.Base.BasicTypes as B.Types
    import qualified Data.GI.Base.ManagedPtr as B.ManagedPtr
    import qualified Data.GI.Base.GArray as B.GArray
    import qualified Data.GI.Base.GClosure as B.GClosure
    import qualified Data.GI.Base.GError as B.GError
    import qualified Data.GI.Base.GHashTable as B.GHT
    import qualified Data.GI.Base.GVariant as B.GVariant
    import qualified Data.GI.Base.GValue as B.GValue
    import qualified Data.GI.Base.GParamSpec as B.GParamSpec
    import qualified Data.GI.Base.CallStack as B.CallStack
    import qualified Data.GI.Base.Properties as B.Properties
    import qualified Data.GI.Base.Signals as B.Signals
    import qualified Control.Monad.IO.Class as MIO
    import qualified Data.Coerce as Coerce
    import qualified Data.Text as T
    import qualified Data.Kind as DK
    import qualified Data.ByteString.Char8 as B
    import qualified Data.Map as Map
    import qualified Foreign.Ptr as FP
    import qualified GHC.OverloadedLabels as OL
    import qualified GHC.Records as R
    import qualified Data.Word as DW
    import qualified Data.Int as DI
    import qualified System.Posix.Types as SPT
    import qualified Foreign.C.Types as FCT

    -- Workaround for https://gitlab.haskell.org/ghc/ghc/-/issues/23392
    #if MIN_VERSION_base(4,18,0)

    #else

    #endif

    -- | Memory-managed wrapper type.
    newtype FontExtentsT = FontExtentsT (SP.ManagedPtr FontExtentsT)
        deriving (FontExtentsT -> FontExtentsT -> Bool
    (FontExtentsT -> FontExtentsT -> Bool)
    -> (FontExtentsT -> FontExtentsT -> Bool) -> Eq FontExtentsT
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: FontExtentsT -> FontExtentsT -> Bool
    == :: FontExtentsT -> FontExtentsT -> Bool
    $c/= :: FontExtentsT -> FontExtentsT -> Bool
    /= :: FontExtentsT -> FontExtentsT -> Bool
    Eq)

    instance SP.ManagedPtrNewtype FontExtentsT where
        toManagedPtr :: FontExtentsT -> ManagedPtr FontExtentsT
    toManagedPtr (FontExtentsT ManagedPtr FontExtentsT
    p) = ManagedPtr FontExtentsT
    p

    instance BoxedPtr FontExtentsT where
        boxedPtrCopy :: FontExtentsT -> IO FontExtentsT
    boxedPtrCopy = \FontExtentsT
    p -> FontExtentsT
    -> (Ptr FontExtentsT -> IO FontExtentsT) -> IO FontExtentsT
    forall a c.
    (HasCallStack, ManagedPtrNewtype a) =>
    a -> (Ptr a -> IO c) -> IO c
    B.ManagedPtr.withManagedPtr FontExtentsT
    p (Int -> Ptr FontExtentsT -> IO (Ptr FontExtentsT)
    forall a. (HasCallStack, CallocPtr a) => Int -> Ptr a -> IO (Ptr a)
    copyBytes Int
    48 (Ptr FontExtentsT -> IO (Ptr FontExtentsT))
    -> (Ptr FontExtentsT -> IO FontExtentsT)
    -> Ptr FontExtentsT
    -> IO FontExtentsT
    forall (m :: * -> *) a b c.
    Monad m =>
    (a -> m b) -> (b -> m c) -> a -> m c
    >=> (ManagedPtr FontExtentsT -> FontExtentsT)
    -> Ptr FontExtentsT -> IO FontExtentsT
    forall a.
    (HasCallStack, BoxedPtr a) =>
    (ManagedPtr a -> a) -> Ptr a -> IO a
    B.ManagedPtr.wrapPtr ManagedPtr FontExtentsT -> FontExtentsT
    FontExtentsT)
        boxedPtrFree :: FontExtentsT -> IO ()
    boxedPtrFree = \FontExtentsT
    x -> FontExtentsT -> (Ptr FontExtentsT -> IO ()) -> IO ()
    forall a c.
    (HasCallStack, ManagedPtrNewtype a) =>
    a -> (Ptr a -> IO c) -> IO c
    SP.withManagedPtr FontExtentsT
    x Ptr FontExtentsT -> IO ()
    forall a. Ptr a -> IO ()
    SP.freeMem
    instance CallocPtr FontExtentsT where
        boxedPtrCalloc :: IO (Ptr FontExtentsT)
    boxedPtrCalloc = Int -> IO (Ptr FontExtentsT)
    forall a. Int -> IO (Ptr a)
    callocBytes Int
    48

    -- | Construct a t'FontExtentsT' struct initialized to zero.
    newZeroFontExtentsT :: MonadIO m => m FontExtentsT
    newZeroFontExtentsT :: forall (m :: * -> *). MonadIO m => m FontExtentsT
    newZeroFontExtentsT = IO FontExtentsT -> m FontExtentsT
    forall a. IO a -> m a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO FontExtentsT -> m FontExtentsT)
    -> IO FontExtentsT -> m FontExtentsT
    forall a b. (a -> b) -> a -> b
    $ IO (Ptr FontExtentsT)
    forall a. CallocPtr a => IO (Ptr a)
    boxedPtrCalloc IO (Ptr FontExtentsT)
    -> (Ptr FontExtentsT -> IO FontExtentsT) -> IO FontExtentsT
    forall a b. IO a -> (a -> IO b) -> IO b
    forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
    >>= (ManagedPtr FontExtentsT -> FontExtentsT)
    -> Ptr FontExtentsT -> IO FontExtentsT
    forall a.
    (HasCallStack, BoxedPtr a) =>
    (ManagedPtr a -> a) -> Ptr a -> IO a
    wrapPtr ManagedPtr FontExtentsT -> FontExtentsT
    FontExtentsT

    instance tag ~ 'AttrSet => Constructible FontExtentsT tag where
        new :: forall (m :: * -> *).
    MonadIO m =>
    (ManagedPtr FontExtentsT -> FontExtentsT)
    -> [AttrOp FontExtentsT tag] -> m FontExtentsT
    new ManagedPtr FontExtentsT -> FontExtentsT
    _ [AttrOp FontExtentsT tag]
    attrs = do
            o <- m FontExtentsT
    forall (m :: * -> *). MonadIO m => m FontExtentsT
    newZeroFontExtentsT
            GI.Attributes.set o attrs
            return o

    -- | Get the value of the “@ascender@” field.
    -- When <https://github.com/haskell-gi/haskell-gi/wiki/Overloading overloading> is enabled, this is equivalent to
    --
    -- @
    -- 'Data.GI.Base.Attributes.get' fontExtentsT #ascender
    -- @
    getFontExtentsTAscender :: MonadIO m => FontExtentsT -> m Int32
    getFontExtentsTAscender :: forall (m :: * -> *). MonadIO m => FontExtentsT -> m Int32
    getFontExtentsTAscender FontExtentsT
    s = IO Int32 -> m Int32
    forall a. IO a -> m a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO Int32 -> m Int32) -> IO Int32 -> m Int32
    forall a b. (a -> b) -> a -> b
    $ FontExtentsT -> (Ptr FontExtentsT -> IO Int32) -> IO Int32
    forall a c.
    (HasCallStack, ManagedPtrNewtype a) =>
    a -> (Ptr a -> IO c) -> IO c
    withManagedPtr FontExtentsT
    s ((Ptr FontExtentsT -> IO Int32) -> IO Int32)
    -> (Ptr FontExtentsT -> IO Int32) -> IO Int32
    forall a b. (a -> b) -> a -> b
    $ \Ptr FontExtentsT
    ptr -> do
        val <- Ptr Int32 -> IO Int32
    forall a. Storable a => Ptr a -> IO a
    peek (Ptr FontExtentsT
    ptr Ptr FontExtentsT -> Int -> Ptr Int32
    forall a b. Ptr a -> Int -> Ptr b
    `plusPtr` Int
    0) :: IO Int32
        return val

    -- | Set the value of the “@ascender@” field.
    -- When <https://github.com/haskell-gi/haskell-gi/wiki/Overloading overloading> is enabled, this is equivalent to
    --
    -- @
    -- 'Data.GI.Base.Attributes.set' fontExtentsT [ #ascender 'Data.GI.Base.Attributes.:=' value ]
    -- @
    setFontExtentsTAscender :: MonadIO m => FontExtentsT -> Int32 -> m ()
    setFontExtentsTAscender :: forall (m :: * -> *). MonadIO m => FontExtentsT -> Int32 -> m ()
    setFontExtentsTAscender FontExtentsT
    s Int32
    val = IO () -> m ()
    forall a. IO a -> m a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO () -> m ()) -> IO () -> m ()
    forall a b. (a -> b) -> a -> b
    $ FontExtentsT -> (Ptr FontExtentsT -> IO ()) -> IO ()
    forall a c.
    (HasCallStack, ManagedPtrNewtype a) =>
    a -> (Ptr a -> IO c) -> IO c
    withManagedPtr FontExtentsT
    s ((Ptr FontExtentsT -> IO ()) -> IO ())
    -> (Ptr FontExtentsT -> IO ()) -> IO ()
    forall a b. (a -> b) -> a -> b
    $ \Ptr FontExtentsT
    ptr -> do
        Ptr Int32 -> Int32 -> IO ()
    forall a. Storable a => Ptr a -> a -> IO ()
    poke (Ptr FontExtentsT
    ptr Ptr FontExtentsT -> Int -> Ptr Int32
    forall a b. Ptr a -> Int -> Ptr b
    `plusPtr` Int
    0) (Int32
    val :: Int32)

    #if defined(ENABLE_OVERLOADING)
    data FontExtentsTAscenderFieldInfo
    instance AttrInfo FontExtentsTAscenderFieldInfo where
        type AttrBaseTypeConstraint FontExtentsTAscenderFieldInfo = (~) FontExtentsT
        type AttrAllowedOps FontExtentsTAscenderFieldInfo = '[ 'AttrSet, 'AttrGet]
        type AttrSetTypeConstraint FontExtentsTAscenderFieldInfo = (~) Int32
        type AttrTransferTypeConstraint FontExtentsTAscenderFieldInfo = (~)Int32
        type AttrTransferType FontExtentsTAscenderFieldInfo = Int32
        type AttrGetType FontExtentsTAscenderFieldInfo = Int32
        type AttrLabel FontExtentsTAscenderFieldInfo = "ascender"
        type AttrOrigin FontExtentsTAscenderFieldInfo = FontExtentsT
        attrGet = getFontExtentsTAscender
        attrSet = setFontExtentsTAscender
        attrConstruct = undefined
        attrClear = undefined
        attrTransfer _ v = do
            return v
        dbgAttrInfo = P.Just (O.ResolvedSymbolInfo {
            O.resolvedSymbolName = "GI.HarfBuzz.Structs.FontExtentsT.ascender"
            , O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-harfbuzz-0.0.10/docs/GI-HarfBuzz-Structs-FontExtentsT.html#g:attr:ascender"
            })

    fontExtentsT_ascender :: AttrLabelProxy "ascender"
    fontExtentsT_ascender = AttrLabelProxy

    #endif

    -- | Get the value of the “@descender@” field.
    -- When <https://github.com/haskell-gi/haskell-gi/wiki/Overloading overloading> is enabled, this is equivalent to
    --
    -- @
    -- 'Data.GI.Base.Attributes.get' fontExtentsT #descender
    -- @
    getFontExtentsTDescender :: MonadIO m => FontExtentsT -> m Int32
    getFontExtentsTDescender :: forall (m :: * -> *). MonadIO m => FontExtentsT -> m Int32
    getFontExtentsTDescender FontExtentsT
    s = IO Int32 -> m Int32
    forall a. IO a -> m a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO Int32 -> m Int32) -> IO Int32 -> m Int32
    forall a b. (a -> b) -> a -> b
    $ FontExtentsT -> (Ptr FontExtentsT -> IO Int32) -> IO Int32
    forall a c.
    (HasCallStack, ManagedPtrNewtype a) =>
    a -> (Ptr a -> IO c) -> IO c
    withManagedPtr FontExtentsT
    s ((Ptr FontExtentsT -> IO Int32) -> IO Int32)
    -> (Ptr FontExtentsT -> IO Int32) -> IO Int32
    forall a b. (a -> b) -> a -> b
    $ \Ptr FontExtentsT
    ptr -> do
        val <- Ptr Int32 -> IO Int32
    forall a. Storable a => Ptr a -> IO a
    peek (Ptr FontExtentsT
    ptr Ptr FontExtentsT -> Int -> Ptr Int32
    forall a b. Ptr a -> Int -> Ptr b
    `plusPtr` Int
    4) :: IO Int32
        return val

    -- | Set the value of the “@descender@” field.
    -- When <https://github.com/haskell-gi/haskell-gi/wiki/Overloading overloading> is enabled, this is equivalent to
    --
    -- @
    -- 'Data.GI.Base.Attributes.set' fontExtentsT [ #descender 'Data.GI.Base.Attributes.:=' value ]
    -- @
    setFontExtentsTDescender :: MonadIO m => FontExtentsT -> Int32 -> m ()
    setFontExtentsTDescender :: forall (m :: * -> *). MonadIO m => FontExtentsT -> Int32 -> m ()
    setFontExtentsTDescender FontExtentsT
    s Int32
    val = IO () -> m ()
    forall a. IO a -> m a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO () -> m ()) -> IO () -> m ()
    forall a b. (a -> b) -> a -> b
    $ FontExtentsT -> (Ptr FontExtentsT -> IO ()) -> IO ()
    forall a c.
    (HasCallStack, ManagedPtrNewtype a) =>
    a -> (Ptr a -> IO c) -> IO c
    withManagedPtr FontExtentsT
    s ((Ptr FontExtentsT -> IO ()) -> IO ())
    -> (Ptr FontExtentsT -> IO ()) -> IO ()
    forall a b. (a -> b) -> a -> b
    $ \Ptr FontExtentsT
    ptr -> do
        Ptr Int32 -> Int32 -> IO ()
    forall a. Storable a => Ptr a -> a -> IO ()
    poke (Ptr FontExtentsT
    ptr Ptr FontExtentsT -> Int -> Ptr Int32
    forall a b. Ptr a -> Int -> Ptr b
    `plusPtr` Int
    4) (Int32
    val :: Int32)

    #if defined(ENABLE_OVERLOADING)
    data FontExtentsTDescenderFieldInfo
    instance AttrInfo FontExtentsTDescenderFieldInfo where
        type AttrBaseTypeConstraint FontExtentsTDescenderFieldInfo = (~) FontExtentsT
        type AttrAllowedOps FontExtentsTDescenderFieldInfo = '[ 'AttrSet, 'AttrGet]
        type AttrSetTypeConstraint FontExtentsTDescenderFieldInfo = (~) Int32
        type AttrTransferTypeConstraint FontExtentsTDescenderFieldInfo = (~)Int32
        type AttrTransferType FontExtentsTDescenderFieldInfo = Int32
        type AttrGetType FontExtentsTDescenderFieldInfo = Int32
        type AttrLabel FontExtentsTDescenderFieldInfo = "descender"
        type AttrOrigin FontExtentsTDescenderFieldInfo = FontExtentsT
        attrGet = getFontExtentsTDescender
        attrSet = setFontExtentsTDescender
        attrConstruct = undefined
        attrClear = undefined
        attrTransfer _ v = do
            return v
        dbgAttrInfo = P.Just (O.ResolvedSymbolInfo {
            O.resolvedSymbolName = "GI.HarfBuzz.Structs.FontExtentsT.descender"
            , O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-harfbuzz-0.0.10/docs/GI-HarfBuzz-Structs-FontExtentsT.html#g:attr:descender"
            })

    fontExtentsT_descender :: AttrLabelProxy "descender"
    fontExtentsT_descender = AttrLabelProxy

    #endif

    -- | Get the value of the “@line_gap@” field.
    -- When <https://github.com/haskell-gi/haskell-gi/wiki/Overloading overloading> is enabled, this is equivalent to
    --
    -- @
    -- 'Data.GI.Base.Attributes.get' fontExtentsT #lineGap
    -- @
    getFontExtentsTLineGap :: MonadIO m => FontExtentsT -> m Int32
    getFontExtentsTLineGap :: forall (m :: * -> *). MonadIO m => FontExtentsT -> m Int32
    getFontExtentsTLineGap FontExtentsT
    s = IO Int32 -> m Int32
    forall a. IO a -> m a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO Int32 -> m Int32) -> IO Int32 -> m Int32
    forall a b. (a -> b) -> a -> b
    $ FontExtentsT -> (Ptr FontExtentsT -> IO Int32) -> IO Int32
    forall a c.
    (HasCallStack, ManagedPtrNewtype a) =>
    a -> (Ptr a -> IO c) -> IO c
    withManagedPtr FontExtentsT
    s ((Ptr FontExtentsT -> IO Int32) -> IO Int32)
    -> (Ptr FontExtentsT -> IO Int32) -> IO Int32
    forall a b. (a -> b) -> a -> b
    $ \Ptr FontExtentsT
    ptr -> do
        val <- Ptr Int32 -> IO Int32
    forall a. Storable a => Ptr a -> IO a
    peek (Ptr FontExtentsT
    ptr Ptr FontExtentsT -> Int -> Ptr Int32
    forall a b. Ptr a -> Int -> Ptr b
    `plusPtr` Int
    8) :: IO Int32
        return val

    -- | Set the value of the “@line_gap@” field.
    -- When <https://github.com/haskell-gi/haskell-gi/wiki/Overloading overloading> is enabled, this is equivalent to
    --
    -- @
    -- 'Data.GI.Base.Attributes.set' fontExtentsT [ #lineGap 'Data.GI.Base.Attributes.:=' value ]
    -- @
    setFontExtentsTLineGap :: MonadIO m => FontExtentsT -> Int32 -> m ()
    setFontExtentsTLineGap :: forall (m :: * -> *). MonadIO m => FontExtentsT -> Int32 -> m ()
    setFontExtentsTLineGap FontExtentsT
    s Int32
    val = IO () -> m ()
    forall a. IO a -> m a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO () -> m ()) -> IO () -> m ()
    forall a b. (a -> b) -> a -> b
    $ FontExtentsT -> (Ptr FontExtentsT -> IO ()) -> IO ()
    forall a c.
    (HasCallStack, ManagedPtrNewtype a) =>
    a -> (Ptr a -> IO c) -> IO c
    withManagedPtr FontExtentsT
    s ((Ptr FontExtentsT -> IO ()) -> IO ())
    -> (Ptr FontExtentsT -> IO ()) -> IO ()
    forall a b. (a -> b) -> a -> b
    $ \Ptr FontExtentsT
    ptr -> do
        Ptr Int32 -> Int32 -> IO ()
    forall a. Storable a => Ptr a -> a -> IO ()
    poke (Ptr FontExtentsT
    ptr Ptr FontExtentsT -> Int -> Ptr Int32
    forall a b. Ptr a -> Int -> Ptr b
    `plusPtr` Int
    8) (Int32
    val :: Int32)

    #if defined(ENABLE_OVERLOADING)
    data FontExtentsTLineGapFieldInfo
    instance AttrInfo FontExtentsTLineGapFieldInfo where
        type AttrBaseTypeConstraint FontExtentsTLineGapFieldInfo = (~) FontExtentsT
        type AttrAllowedOps FontExtentsTLineGapFieldInfo = '[ 'AttrSet, 'AttrGet]
        type AttrSetTypeConstraint FontExtentsTLineGapFieldInfo = (~) Int32
        type AttrTransferTypeConstraint FontExtentsTLineGapFieldInfo = (~)Int32
        type AttrTransferType FontExtentsTLineGapFieldInfo = Int32
        type AttrGetType FontExtentsTLineGapFieldInfo = Int32
        type AttrLabel FontExtentsTLineGapFieldInfo = "line_gap"
        type AttrOrigin FontExtentsTLineGapFieldInfo = FontExtentsT
        attrGet = getFontExtentsTLineGap
        attrSet = setFontExtentsTLineGap
        attrConstruct = undefined
        attrClear = undefined
        attrTransfer _ v = do
            return v
        dbgAttrInfo = P.Just (O.ResolvedSymbolInfo {
            O.resolvedSymbolName = "GI.HarfBuzz.Structs.FontExtentsT.lineGap"
            , O.resolvedSymbolURL = "https://hackage.haskell.org/package/gi-harfbuzz-0.0.10/docs/GI-HarfBuzz-Structs-FontExtentsT.html#g:attr:lineGap"
            })

    fontExtentsT_lineGap :: AttrLabelProxy "lineGap"
    fontExtentsT_lineGap = AttrLabelProxy

    #endif

    #if defined(ENABLE_OVERLOADING)
    instance O.HasAttributeList FontExtentsT
    type instance O.AttributeList FontExtentsT = FontExtentsTAttributeList
    type FontExtentsTAttributeList = ('[ '("ascender", FontExtentsTAscenderFieldInfo), '("descender", FontExtentsTDescenderFieldInfo), '("lineGap", FontExtentsTLineGapFieldInfo)] :: [(Symbol, DK.Type)])
    #endif

    #if defined(ENABLE_OVERLOADING)
    type family ResolveFontExtentsTMethod (t :: Symbol) (o :: DK.Type) :: DK.Type where
        ResolveFontExtentsTMethod l o = O.MethodResolutionFailed l o

    instance (info ~ ResolveFontExtentsTMethod t FontExtentsT, O.OverloadedMethod info FontExtentsT p) => OL.IsLabel t (FontExtentsT -> p) where
    #if MIN_VERSION_base(4,10,0)
        fromLabel = O.overloadedMethod @info
    #else
        fromLabel _ = O.overloadedMethod @info
    #endif

    #if MIN_VERSION_base(4,13,0)
    instance (info ~ ResolveFontExtentsTMethod t FontExtentsT, O.OverloadedMethod info FontExtentsT p, R.HasField t FontExtentsT p) => R.HasField t FontExtentsT p where
        getField = O.overloadedMethod @info

    #endif

    instance (info ~ ResolveFontExtentsTMethod t FontExtentsT, O.OverloadedMethodInfo info FontExtentsT) => OL.IsLabel t (O.MethodProxy info FontExtentsT) where
    #if MIN_VERSION_base(4,10,0)
        fromLabel = O.MethodProxy
    #else
        fromLabel _ = O.MethodProxy
    #endif

    #endif