code: func GLAreaNew() (*GLArea, error) {
  	c := C.gtk_gl_area_new()
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	obj := glib.Take(unsafe.Pointer(c))
  
  	return wrapGLArea(obj), nil
  }
docs: // GLAreaNew is a wrapper around gtk_gl_area_new().