@Override
	public String toString() {
		StringBuilder sb = new StringBuilder("ParentLastURLCL\r\nURLs: ");
		sb.append(Arrays.asList(getURLs()));
		sb.append("\nParent CL: ");
		sb.append(getParent());
		sb.append("\nSystem CL: ");
		sb.append(system);
		sb.append("\n");
		return (sb.toString());
	}
When loading spring schema related files, multiples resources will be loaded in turn in a {@link Properties}
object, with later mappings overriding previous ones. Hence, we actually want our directly loaded properties to
appear *last*. This is especially useful for version-less xsd mappings, where the one from our jar should be
considered the *current* one, not the one that was current in a jar with a different version.

@see PropertiesLoaderUtils
@see PluggableSchemaResolver
spring-xd-module/src/main/java/org/springframework/xd/module/support/ParentLastURLClassLoader.java