@Override
	public String toDSL() {
		String dsl = FixtureUtils.labelOrEmpty(label);
		dsl += String.format("file --binary=%s --mode=%s ", binary, mode);
		if (StringUtils.hasText(fileName)) {
			dsl += "--name='" + fileName + "' ";
		}
		if (StringUtils.hasText(dir)) {
			dsl += "--dir='" + dir + "' ";
		}
		return dsl;
	}
Renders the default DSL for this fixture.
spring-xd-test-fixtures/src/main/java/org/springframework/xd/test/fixtures/SimpleFileSink.java