class_docstr: State manager for groups of widgets.
  
  WidgetGroup handles common problems that arise when dealing with groups of widgets like a control
  panel:
  - Provide a single place for saving / restoring the state of all widgets in the group
  - Provide a single signal for detecting when any of the widgets have changed
code: def acceptsType(self, obj):
      for c in WidgetGroup.classes:
          if isinstance(obj, c):
              return True
      if hasattr(obj, "widgetGroupInterface"):
          return True
      return False
  
imports: import inspect
  import weakref
  from .Qt import QtCore, QtWidgets
label_desc: Use image node_id 7 for calling the WidgetGroup obj's underlying member method code with example usage: obj.acceptsType(obj) and returns: False, True, True