index.js
function emit(name, a, b) {
  a.on(name, b.emit.bind(b, name));
}
function emit(name, a, b) {
  a.on(name, b.emit.bind(b, name));
}
function emit ( name , a , b ) { a . on ( name , b . emit . bind ( b , name ) ) ; }
Forward events from emitter `a` to emitter `b`
Forward events from emitter a to emitter b