<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def has_data(self):
 """Return whether or not the stash has any data available or not."""

        if not hasattr(self, '_has_data'):
            try:
                next(iter(self.delegate.keys()))
                self._has_data = True
            except StopIteration:
                self._has_data = False
        return self._has_data