anything.js: NFR - Missing function

hello, download this to use function NSS_SetFrancePolicy but can’t find it anywhere

    <>c__DisplayClass3 class2; // <== compiler generated type; unpronounceable
    <>c__DisplayClass1 class3; // <== compiler generated type; unpronounceable
    class3 = new <>c__DisplayClass1(); // outer-scope context
    class3.someValue = someValue;
    task = null;
    class2 = new <>c__DisplayClass3(); // <== inner-scope context
    class2.CS$<>8__locals2 = class3; // <== bind the contexts
    class2.anotherValue = 2;
    class2.valuesRef = someValues;
    task = new Task(new Action(class2.<SomeMethod>b__0));
    task.Start();
    return;

as you can it isn’t there, get error

please help