How to use own random function with the SimplexNoise library? | Three.js | Page 1

I have read in the documentation that you can pass an object that has a random method for custom stuff so in my case
I have done

import { SimplexNoise } from 'three/examples/jsm/math/SimplexNoise.js';

class wrapper {
    public randomFunc;
    constructor(seed:number){
        this.randomFunc = mulberry32(seed);
    }
    public random(){
        return this.randomFunc;
    }

}

function mulberry32(seed:number) {
    return function() {
        let t = (seed += 0x6D2B79F5);
        t = Math.imul(t ^ (t >>> 15), t | 1);
        t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
        return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
    };
}


const wrappedRandom = new wrapper(1)
const noise = new SimplexNoise(wrappedRandom);
const raw = noise.noise(1, 1);
console.log(raw)

however this results in

    at SimplexNoise._dot (SimplexNoise.js:452:10)
    at SimplexNoise.noise (SimplexNoise.js:123:24)
    at test.ts:25:19

simply turning it to const noise = new SimplexNoise(); fixes it, but why? whats causing this to have issues?

#How to use own random function with the SimplexNoise library?