// to load Tigon classes
Thread.currentThread().setContextClassLoader(FlowletProgramRunner.class.getClassLoader());
// Inject DataSet, OutputEmitter, Metric fields
Reflections.visit(flowlet, TypeToken.of(flowlet.getClass()),
new PropertyFieldSetter(flowletDef.getFlowletSpec().getProperties()),
new MetricsFieldSetter(flowletContext.getMetrics()),
new OutputEmitterFieldSetter(outputEmitterFactory(flowletContext, flowletName,
dataFabricFacade, queueSpecs))
);