Function update

src/common/options.js:25–33

(data)

    return sendCmdDirectly('SetOptions', { [key]: value });
  },
  update(data) {
    // Keys in `data` may be { flattened.like.this: 'foo' }
    const expandedData = {};
    data::forEachEntry(([key, value]) => {
      objectSet(options, key, value);
      objectSet(expandedData, key, value);
    });
    fire(expandedData);
  },
};