26c97c4069
This has been a feature in Flow for a long time (couldn't easily find a specific commit adding this). Interfaces are basically undocumented, though, so it's easy to see how this was missed.
babel-generator
Turns an AST into code.
Install
$ npm install babel-generator
Usage
import {parse} from 'babylon';
import generate from 'babel-generator';
const code = 'class Example {}';
const ast = parse(ast);
const output = generate(ast, { /* options */ }, code);