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node_modules/mongoose/lib/helpers/once.js
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12
node_modules/mongoose/lib/helpers/once.js
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'use strict';
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module.exports = function once(fn) {
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let called = false;
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return function() {
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if (called) {
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return;
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}
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called = true;
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return fn.apply(null, arguments);
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};
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};
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