Utility class for retrieving declared fields or methods in a particular order, because the JVM doesn't guarantee ordering for listing declared methods. We don't externally guarantee an ordering, but having a consistent ordering allows deterministic behavior and simpler tests.

For class ordering, within a single classloader there can only be one class with a given name, so we just compare the names.

For method ordering, within a single class it is sufficient to compare the non-generic method signature which consists of the name, return type and parameter types.