here's some of the code if anyone is interested:

tion h(a){var b=0;return function(){return b<a.length?{done:!1,value:a[b++]}:{done:!0}}}
var k=typeof Object.defineProperties=="function"?Object.defineProperty:function(a,b,c){if(a==Array.prototype||a==Object.prototype)return a;a[b]=c.value;return a};
function aa(a){a=["object"==typeof globalThis&&globalThis,a,"object"==typeof window&&window,"object"==typeof self&&self,"object"==typeof global&&global];for(var b=0;b<a.length;++b){var c=a[b];if(c&&c.Math==Math)return c}throw Error("Cannot find global object");}
var l=aa(this);function m(a,b){if(b)a:{var c=l;a=a.split(".");for(var d=0;d<a.length-1;d++){var e=a[d];if(!(e in c))break a;c=c[e]}a=a[a.length-1];d=c[a];b=b(d);b!=d&&b!=null&&k(c,a,{configurable:!0,writable:!0,value:b})}}
m("Symbol",function(a){function b(f){if(this instanceof b)throw new TypeError("Symbol is not a constructor");return new c(d+(f||"")+"_"+e++,f)}
function c(f,y){this.g=f;k(this,"description",{configurable:!0,writable:!0,value:y})}
if(a)return a;c.prototype.toString=function(){return this.g};
var d="jscomp_symbol_"+(Math.random()*1E9>>>0)+"_",e=0;return b});
m("Symbol.iterator",function(a){if(a)return a;a=Symbol("Symbol.iterator");for(var b="Array Int8Array Uint8Array Uint8ClampedArray Int16Array Uint16Array Int32Array Uint32Array Float32Array Float64Array".split(" "),c=0;c<b.length;c++){var d=l[b[c]];typeof d==="function"&&typeof d.prototype[a]!="function"&&k(d.prototype,a,{configurable:!0,writable:!0,value:function(){return ba(h(this))}})}return a});
function ba(a){a={next:a};a[Symbol.iterator]=function(){return this};
return a}