`Pango.font_description ->
object
method copy : GPango.font_description
method family : string
method fd : Pango.font_description
method modify :
?family:string ->
?style:Pango.Tags.style ->
?variant:Pango.Tags.variant ->
?weight:Pango.Tags.weight ->
?stretch:Pango.Tags.stretch -> ?size:int -> unit -> unit
method size : int
method stretch : Pango.Tags.stretch
method style : Pango.Tags.style
method to_string : string
method variant : Pango.Tags.variant
method weight : int
end`