code: def mapFromParent(self, point):
      tr = self.transform()
      if tr is None:
          return point
      return tr.inverted()[0].map(point)
  
imports: from OpenGL.GL import *
  from OpenGL import GL
  from ..None import Transform3D
  from ..Qt import QtCore
label_desc: Use image node_id 30 for calling the GLGraphicsItem obj's underlying member method code with example usage: obj.mapFromParent(point) and returns: tr, point