@utilities.arguments_not_none<EOL><INDENT>def get_banks_by_item(self, item_id):<DEDENT>
<EOL>mgr = self._get_provider_manager('<STR_LIT>', local=True)<EOL>lookup_session = mgr.get_bank_lookup_session(proxy=self._proxy)<EOL>return lookup_session.get_banks_by_ids(<EOL>self.get_bank_ids_by_item(item_id))<EOL>
Gets the list of ``Banks`` mapped to an ``Item``.

        arg:    item_id (osid.id.Id): ``Id`` of an ``Item``
        return: (osid.assessment.BankList) - list of banks
        raise:  NotFound - ``item_id`` is not found
        raise:  NullArgument - ``item_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - assessment failure
        *compliance: mandatory -- This method must be implemented.*