`object
method activate_proposal :
GSourceView2.source_completion_proposal -> GText.iter -> bool
method activation :
SourceView2Enums.source_completion_activation_flags list
method icon : GdkPixbuf.pixbuf option
method info_widget :
GSourceView2.source_completion_proposal -> GObj.widget option
method interactive_delay : int
method matched : GSourceView2.source_completion_context -> bool
method name : string
method populate : GSourceView2.source_completion_context -> unit
method priority : int
method start_iter :
GSourceView2.source_completion_context ->
GSourceView2.source_completion_proposal -> GText.iter -> bool
method update_info :
GSourceView2.source_completion_proposal ->
GSourceView2.source_completion_info -> unit
end`