@Override
	protected String toDSL() {
		StringBuilder dsl = new StringBuilder();
		dsl.append(FixtureUtils.labelOrEmpty(label));

		dsl.append("transform");

		if (expression != null) {
			dsl.append(" --expression=");
			dsl.append(expression);
		}
		else if (script != null) {
			dsl.append(" --script=");
			dsl.append(script);
		}
		if (propertiesLocation != null) {
			dsl.append(" --propertiesLocation =" + propertiesLocation);
		}

		return dsl.toString();
	}
Renders the default DSL for this fixture.
spring-xd-test-fixtures/src/main/java/org/springframework/xd/test/fixtures/Transform.java