public static Iterable<ConfigurationPropertySource> from(PropertySource<?> source) {
		return Collections.singleton(ConfigurationPropertySource.from(source));
	}
@Test
	void fromWhenSourceIsAlreadyConfigurationPropertySourcesPropertySourceReturnsNull() {
		ConfigurationPropertySourcesPropertySource source = mock(ConfigurationPropertySourcesPropertySource.class);
		assertThat(ConfigurationPropertySource.from(source)).isNull();
	}