class Common<T extends Common<T>> {
    constructor() { console.log("constructor") }

    static instantiate<S extends Common<S>> (factory: () => S, second: String): S {
        console.log("instantiate")
        const instance = factory()
        console.log(second)
        return instance
    }
}

class Y extends Common<Y> {}

export function main() {
    Y("foo")
}