@Override
			public boolean getMessageHandled() {
				if (counter.get() == 10 && startFileMarker != null && endFileMarker != null) {
					super.messageHandled = true;
				}
				return super.messageHandled;
			}
@author David Turanski
@author Gunnar Hillert
@author Gary Russell
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/stream/FileSourceModuleTests.java