def METHOD_NAME():
    global DID_INIT
    if DID_INIT:
        return
    assert subprocess.call(
        'node -v', shell=True, cwd=DIRNAME
    ) == 0, 'You must have node installed! run: brew install node'
    assert subprocess.call(
        'cd %s;npm install babel-core babel-cli babel-preset-es2015 babel-polyfill babelify browserify browserify-shim'
        % repr(DIRNAME),
        shell=True,
        cwd=DIRNAME) == 0, 'Could not link required node_modules'
    DID_INIT = True