code: def get_class_that_defined_method(meth):
      
      if inspect.ismethod(meth):
          for cls in inspect.getmro(meth.__self__.__class__):
              if cls.__dict__.get(meth.__name__) is meth:
                  return cls
          meth = meth.__func__  # fallback to __qualname__ parsing
      if inspect.isfunction(meth):
          cls = getattr(
              inspect.getmodule(meth),
              meth.__qualname__.split('.<locals>', 1)[0].rsplit('.', 1)[0])
          if isinstance(cls, type):
              return cls
      return None
docs: Gets the class object which defined a given method
  
          @meth: a class method
  
          -> owner class object