Constructor returned by DomEmitterMixin. Use it to name a mixin base class before extending it.
DomEmitterMixin
const MyDomEmitterBase: DomEmitterMixinConstructor<typeof BaseClass> = DomEmitterMixin( BaseClass ); class MyDomEmitter extends MyDomEmitterBase {}
Base
Base extends Constructor<Emitter> ? Mixed<Base, DomEmitter> : new () => DomEmitter