JSON.parse(JSON.stringify(obj));
lodash
https://lodash.com/docs/
https://www.npmjs.com/package/lodash.clonedeep
https://stackoverflow.com/questions/122102/what-is-the-most-efficient-way-to-deep-clone-an-object-in-javascript
https://medium.com/javascript-in-plain-english/how-to-deep-copy-objects-and-arrays-in-javascript-7c911359b089
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