* Returns the implementation class loader for the built-in plugins.
     */
    ClassLoader getPluginsClassLoader();

    /**
     * Just the Gradle core API, no core plugins.
     */
    ClassLoader getGradleCoreApiClassLoader();

    /**
     * Returns a copy of the filter spec for the Gradle API Classloader.  This is expensive to calculate, so we create it once in
     * the build process and provide it to the worker.
     */