def _format_return_value_symbol (self, retval):
is_void = retval[0] is None or \
retval[0].get_extension_attribute('gi-extension',
'gi_name') == 'none'
if self.__gi_extension.language == 'c':
if is_void:
retval = [None]
else:
retval = retval[:1]
elif is_void:
retval = retval[1:] or [None]
return HtmlFormatter._format_return_value_symbol (self, retval)
