entry.isClassPathArchive -> jarClassBytesIndexFor(entry)
                entry.isDirectory -> directoryClassBytesIndexFor(entry)
                else -> { _ -> null }
            }

            is ClassLoader -> loaderClassBytesIndexFor(entry)

            else -> { _ -> null }
        }

    private
    fun jarClassBytesIndexFor(jar: File): ClassBytesIndex = { classFilePath ->