code: func (v *Entry) GetCurrentIconDragSource() int {
  	c := C.gtk_entry_get_current_icon_drag_source(v.native())
  	return int(c)
  }
docs: // TODO(jrick) GdkDragAction
  /*
  func (v *Entry) SetIconDragSource() {
  }
  */
  // GetCurrentIconDragSource() is a wrapper around
  // gtk_entry_get_current_icon_drag_source().