gtk/text_view.go
func (v *TextView) GetLeftMargin() int {
	c := C.gtk_text_view_get_left_margin(v.native())
	return int(c)
}
func (v *TextView) GetLeftMargin() int {
	c := C.gtk_text_view_get_left_margin(v.native())
	return int(c)
}
// GetLeftMargin is a wrapper around gtk_text_view_get_left_margin().