protected File resolveScriptFile(File dir, String basename) {
        return resolver().resolveScriptFile(dir, basename);
    }

    private List<File> initScriptsIn(File initScriptsDir) {
        return resolver().findScriptsIn(initScriptsDir);
    }

    private DefaultScriptFileResolver resolver() {
        return new DefaultScriptFileResolver();
    }

     *
     * @param dir the directory in which to search
     *
     * @return list containing all script files found in the given directory in no particular order
     *
     * @since 4.6
     */
     List<File> findScriptsIn(File dir);

        return null;
    }

    private boolean isCandidateFile(File candidate) {
        notifyListener(candidate);
        return candidate.isFile();
    }

    @Override
    public List<File> findScriptsIn(File dir) {
        File[] candidates = dir.listFiles();
        if (candidates == null || candidates.length == 0) {
            return emptyList();
        }

        candidate.isDirectory() && hasGradleScript(candidate)
    }

    private static boolean hasGradleScript(File dir) {
        !new DefaultScriptFileResolver().findScriptsIn(dir).isEmpty()
    }