code: def isClosable(self):
      return self.closeButton is not None
  
imports: import warnings
  from ..Qt import QtCore, QtGui, QtWidgets
  from ..widgets.VerticalLabel import VerticalLabel
  from .DockDrop import DockDrop
label_desc: Use image node_id 5 for calling the DockLabel obj's underlying member method code with example usage: obj.isClosable() and returns: unknown