gtk/gtk.go
func (v *Entry) SetVisibility(visible bool) {
	C.gtk_entry_set_visibility(v.native(), gbool(visible))
}
func (v *Entry) SetVisibility(visible bool) {
	C.gtk_entry_set_visibility(v.native(), gbool(visible))
}
// TODO(jrick) GdkRectangle
/*
func (v *Entry) GetTextArea() {
}
*/
// SetVisibility() is a wrapper around gtk_entry_set_visibility().