public TwitterSearchSource twitterSearch(String query) {
		Assert.hasText(query, "query must not be empty nor null");
		return TwitterSearchSource
				.withDefaults(xdEnvironment.getTwitterConsumerKey(), xdEnvironment.getTwitterConsumerSecretKey(),
						query);
	}
Construct a TwitterSearchSource using that will search for the query string provided..

@param query The string to search for on twitter.
@return An instance of the twitterSearchSource fixture.
spring-xd-integration-test/src/main/java/org/springframework/xd/integration/fixtures/Sources.java