| 123456789101112131415 | "use strict";Object.defineProperty(exports, "__esModule", {    value: true});exports.default = onlyOnce;function onlyOnce(fn) {    return function (...args) {        if (fn === null) throw new Error("Callback was already called.");        var callFn = fn;        fn = null;        callFn.apply(this, args);    };}module.exports = exports.default;
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