Maybe I missed this in the docs somewhere but I can't seem to chain .mustAsync and I'm unsure if I'm doing something wrong or if it is just not possible. The following example does not work. I'll keep digging in the docs and code but it'd be great if someone could help me understand why this does not work. Thanks 😄

import { AsyncValidator } from 'fluentvalidation-ts';

type MyType = {
    field: string;
};

class Test extends AsyncValidator<MyType> {
    constructor() {
        super();

        this.ruleFor('field')
            .mustAsync(async () => true)
            .mustAsync(async () => true);
    }
}