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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _handle_end(self):
 """Handle the end of the stream of wikitext."""

        if self._context & contexts.FAIL:
            if self._context & contexts.TAG_BODY:
                if is_single(self._stack[1].text):
                    return self._handle_single_tag_end()
            if self._context & contexts.TABLE_CELL_OPEN:
                self._pop()
            if self._context & contexts.DOUBLE:
                self._pop()
            self._fail_route()
        return self._pop()