docstr: Return True if the item is currently set to be visible.
  Note that this does not guarantee that the item actually appears in the
  view, as it may be obscured or outside of the current view area.
code: def visible(self):
      """Return True if the item is currently set to be visible.
      Note that this does not guarantee that the item actually appears in the
      view, as it may be obscured or outside of the current view area.
      """
      return self.__visible
  
imports: from OpenGL.GL import *
  from OpenGL import GL
  from ..None import Transform3D
  from ..Qt import QtCore
label_desc: Use image node_id 22 for calling the GLGraphicsItem obj's underlying member method code with example usage: obj.visible() and returns: self