def _maybe_update_cacher(self, clear=False, verify_is_copy=True):
cacher = getattr(self, '<STR_LIT>', None)<EOL>if cacher is not None:<EOL><INDENT>ref = cacher[<NUM_LIT:1>]()<EOL>if ref is None:<EOL><INDENT>del self._cacher<EOL><DEDENT>else:<EOL><INDENT>try:<EOL><INDENT>ref._maybe_cache_changed(cacher[<NUM_LIT:0>], self)<EOL><DEDENT>except Exception:<EOL><INDENT>pass<EOL><DEDENT><DEDENT><DEDENT>if verify_is_copy:<EOL><INDENT>self._check_setitem_copy(stacklevel=<NUM_LIT:5>, t='<STR_LIT>')<EOL><DEDENT>if clear:<EOL><INDENT>self._clear_item_cache()<EOL><DEDENT>
See if we need to update our parent cacher if clear, then clear our
cache.

Parameters
----------
clear : boolean, default False
    clear the item cache
verify_is_copy : boolean, default True
    provide is_copy checks