docstr: Scale the object by (*dx*, *dy*, *dz*) in its local coordinate system.
  If *local* is False, then scale takes place in the parent's coordinates.
code: def scale(self, x, y, z, local=True):
      """
      Scale the object by (*dx*, *dy*, *dz*) in its local coordinate system.
      If *local* is False, then scale takes place in the parent's coordinates.
      """
      tr = Transform3D()
      tr.scale(x, y, z)
      self.applyTransform(tr, local=local)
  
imports: from OpenGL.GL import *
  from OpenGL import GL
  from ..None import Transform3D
  from ..Qt import QtCore
label_desc: Use image node_id 18 for calling the GLGraphicsItem obj's underlying member method code with example usage: obj.scale(x, y, z, local) without return types