### Question:
TransformProcessor { @Transformer(inputChannel = Processor.INPUT, outputChannel = Processor.OUTPUT) public Object transform(String message) { System.out.println("transform: " + message); return message.toUpperCase(); }  @Transformer(inputChannel = Processor.INPUT, outputChannel = Processor.OUTPUT) Object transform(String message);  }### Answer:
@Test public void sinkSenderTester() { Object msg=transformProcessor.transform("Spring cloud stream! Procesor！"); System.out.println(msg); }