@property<EOL><INDENT>def closed(self, warning_on=CLOSED_WARNING_ON):<DEDENT>
mes = ("<STR_LIT>"<EOL>"<STR_LIT>"<EOL>"<STR_LIT>"<EOL>"<STR_LIT>"<EOL>"<STR_LIT>")<EOL>if warning_on:<EOL><INDENT>warn(mes)<EOL><DEDENT>return self._closed and self._is_closable()<EOL>
The closed attribute is deprecated, please use the isclosed()
        method instead.  See _closed_warning for more information.