| 1 | // copied from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze
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| 2 | function deepFreeze(object) {
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| 3 | const propNames = Object.getOwnPropertyNames(object);
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| 4 | for (const name of propNames) {
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| 5 | const value = object[name];
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| 6 | if (value && typeof value === 'object') {
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| 7 | deepFreeze(value);
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| 8 | }
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| 9 | }
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| 10 | return Object.freeze(object);
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| 11 | }
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| 12 | export default function freezeSys(obj) {
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| 13 | deepFreeze(obj.sys || {});
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| 14 | return obj;
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| 15 | }
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