public static TwitterSearchSource withDefaults(String consumerKey, String consumerSecret, String query) {
		Assert.hasText(consumerKey, "consumerKey must not be empty nor null");
		Assert.hasText(consumerSecret, "consumerSecret must not be empty nor null");
		Assert.hasText(query, "query must not be empty nor null");

		return new TwitterSearchSource(consumerKey, consumerSecret, query);
	}
Initializes a TwitterSearchSource fixture with a fixed delay of 30000 and an output type of application/json.

@param consumerKey The users twitter consumer key
@param consumerSecret The users twitter comsumer secret key
@param query The query the twitter source will execute.
spring-xd-test-fixtures/src/main/java/org/springframework/xd/test/fixtures/TwitterSearchSource.java