`object
val virtual obj : [> `adjustment ] Gobject.obj
method lower : float
method page_increment : float
method page_size : float
method set_lower : float -> unit
method set_page_increment : float -> unit
method set_page_size : float -> unit
method set_step_increment : float -> unit
method set_upper : float -> unit
method set_value : float -> unit
method step_increment : float
method upper : float
method value : float
end`