def RequestClientApproval(self, client_id, token=None, approver="approver"):
    flow.GRRFlow.StartFlow(client_id=client_id,
                           flow_name="RequestClientApprovalFlow",
                           reason=token.reason,
                           subject_urn=rdf_client.ClientURN(client_id),
                           approver=approver,
                           token=token)
Tests that avail_sizes returns an empty dictionary.
dataset/ETHPy150Open google/grr/grr/lib/test_lib.py/GRRBaseTest.RequestClientApproval--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/cloud/clouds/opennebula_test.py/OpenNebulaTestCase.test_avail_sizes