parameters: (self, include_setitem=False)
return_statement: return self.get_definition(include_setitem=include_setitem) is not None
docstring: Returns True if the name is being defined.
docstring_summary: Returns True if the name is being defined.
docstring_tokens: Returns True if the name is being defined .
function: def is_definition(self, include_setitem=False):
          """
          Returns True if the name is being defined.
          """
          return self.get_definition(include_setitem=include_setitem) is not None
function_tokens: def is_definition ( self , include_setitem = False ) : return self . get_definition ( include_setitem = include_setitem ) is not None