margrete_rpc
attribute__all__= ['CallbackTracer', 'Margrete', 'MargreteDiscoveryError', 'MargreteError', 'MargreteInstance', 'MargreteProtocolError', 'MargreteRemoteError', 'NoopTracer', 'ServerStatus', 'TraceEvent', 'Tracer', 'discovery_dir', 'list_instances', 'resolve_endpoint']