<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def cache_info(self):
 """Report repertoire cache statistics."""

        return {
            'single_node_repertoire':
                self._single_node_repertoire_cache.info(),
            'repertoire': self._repertoire_cache.info(),
            'mice': self._mice_cache.info()
        }