@Override
	public Iterator<ConfigDataEnvironmentContributor> iterator() {
		return this.root.iterator();
	}
@Test
	void iteratorWhenSingleContributorReturnsSingletonIterator() {
		ConfigDataEnvironmentContributor contributor = createBoundContributor("a");
		assertThat(asLocationsList(contributor.iterator())).containsExactly("a");
	}