parameters: (function, name)
return_statement: return FunctionType(function.__code__,
                          function.__globals__,
                          name,
                          function.__defaults__)
docstring: Returns a function identical to the specified function, but with
      the specified name.
docstring_summary: Returns a function identical to the specified function, but with
      the specified name.
docstring_tokens: Returns a function identical to the specified function but with the specified name .
function: def RenameFunction(function, name):
      """
      Returns a function identical to the specified function, but with
      the specified name.
      """
      return FunctionType(function.__code__,
                          function.__globals__,
                          name,
                          function.__defaults__)
function_tokens: def RenameFunction ( function , name ) : return FunctionType ( function . __code__ , function . __globals__ , name , function . __defaults__ )