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rOACCT/node_modules/core-js/internals/check-correctness-of-iteration.js
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check-correctness-of-iteration.js
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			var wellKnownSymbol = require('../internals/well-known-symbol');

			var ITERATOR = wellKnownSymbol('iterator');
			var SAFE_CLOSING = false;

			try {
			var called = 0;
			var iteratorWithReturn = {
			next: function () {
			return { done: !!called++ };
			},
			'return': function () {
			SAFE_CLOSING = true;
			}
			};
			iteratorWithReturn[ITERATOR] = function () {
			return this;
			};
			// eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing
			Array.from(iteratorWithReturn, function () { throw 2; });
			} catch (error) { /* empty */ }

			module.exports = function (exec, SKIP_CLOSING) {
			if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
			var ITERATION_SUPPORT = false;
			try {
			var object = {};
			object[ITERATOR] = function () {
			return {
			next: function () {
			return { done: ITERATION_SUPPORT = true };
			}
			};
			};
			exec(object);
			} catch (error) { /* empty */ }
			return ITERATION_SUPPORT;
			};