Builtin_GateValve = getResourceOrNull(graph, URIs.Builtin_GateValve);
Builtin_GateValveGeometryProvider = getResourceOrNull(graph, URIs.Builtin_GateValveGeometryProvider);
Builtin_HorizontalTank = getResourceOrNull(graph, URIs.Builtin_HorizontalTank);
Builtin_GateValve = getResourceOrNull(graph, URIs.Builtin_GateValve);
Builtin_GateValveGeometryProvider = getResourceOrNull(graph, URIs.Builtin_GateValveGeometryProvider);
Builtin_HorizontalTank = getResourceOrNull(graph, URIs.Builtin_HorizontalTank);