code: def addItem(self, item):
      self.items.append(item)
  
      if self.isValid():
          item.initialize()
  
      item._setView(self)
      self.update()
  
imports: from OpenGL.GL import *
  import OpenGL.GL.framebufferobjects
  from math import cos, radians, sin, tan
  import numpy
  from ..None import Vector
  from ..None import functions
  from ..None import getConfigOption
  from ..Qt import QtCore, QtGui, QtWidgets
label_desc: Use image node_id 5 for calling the GLViewMixin obj's underlying member method code with example usage: obj.addItem(item) without return types