cairo/canvas.go
func (v *Context) GetLineJoin() LineJoin {
	c := C.cairo_get_line_join(v.native())
	return LineJoin(c)
}
func (v *Context) GetLineJoin() LineJoin {
	c := C.cairo_get_line_join(v.native())
	return LineJoin(c)
}
// GetLineJoin is a wrapper around cairo_get_line_join().