According to the only Q&A item in the section Common Questions support for user defined languages is not possible at the moment. So if the language is not supported out of the box, then it's not supported.
But support for it may be near, and support for ES6 may be even nearer.
According to the only Q&A item in the section Common Questions support for user defined languages is not possible at the moment. So if the language is not supported out of the box, then it's not supported.
But support for it may be near, and support for ES6 may be even nearer.