fluid-ws-java-client/src/main/java/com/fluidbpm/ws/client/v1/websocket/AGenericListMessageHandler.java
public void addExpectedMessage(String expectedMessageEchoParam)
	{
		if(expectedMessageEchoParam == null ||
				expectedMessageEchoParam.trim().isEmpty()) {
			return;
		}

		this.expectedEchoMessagesBeforeComplete.add(expectedMessageEchoParam);
	}
public void addExpectedMessage(String expectedMessageEchoParam)
	{
		if(expectedMessageEchoParam == null ||
				expectedMessageEchoParam.trim().isEmpty()) {
			return;
		}

		this.expectedEchoMessagesBeforeComplete.add(expectedMessageEchoParam);
	}
Adds the {@code expectedMessageEchoParam} echo to expect as a
return value before the Web Socket operation may be regarded as complete.

@param expectedMessageEchoParam The echo to expect.