def _get_override_lookup_session(self):
from ..utilities import OVERRIDE_VAULT_TYPE<EOL>try:<EOL><INDENT>override_vaults = self._get_vault_lookup_session().get_vaults_by_genus_type(OVERRIDE_VAULT_TYPE)<EOL><DEDENT>except Unimplemented:<EOL><INDENT>return None<EOL><DEDENT>if override_vaults.available():<EOL><INDENT>vault = override_vaults.next()<EOL><DEDENT>else:<EOL><INDENT>return None<EOL><DEDENT>session = self._get_authz_manager().get_authorization_lookup_session_for_vault(vault.get_id())<EOL>session.use_isolated_vault_view()<EOL>return session<EOL>
Gets the AuthorizationLookupSession for the override typed Vault

        Assumes only one