import { Mixin } from 'ts-mixer'

class Foo implements Partial<FooBar> {
	public fromFoo = 'fromFoo'

	protected makeFoo() {
		const singleAs = this as FooBar
		const doubleAs = (this as unknown as FooBar).fromBar
		return `foo${this.fromBar}`
	}
}

class Bar {
	public fromBar = 'fromBar'
	protected mixed = (this as unknown as FooBar)
	protected makeBar() {
		return `bar${this.mixed.fromFoo}`
	}
}

class FooBar extends Mixin(Foo, Bar) {
	public makeFooBar() {
		return this.makeFoo() + this.makeBar()
	}
}

const fooBar = new FooBar()

console.log(fooBar.makeFooBar()) // "foobar"