Merge JavaScript Proxy methods

[jcalfee]

Is it possible for merge to capture a generic getter or setter from a proxy?

I'm providing:

const additionalJsContext = new Proxy({}, {
  set(obj, prop, value) {
    debug('set', {prop, value})
    obj[prop] = value
    return true
  },

  get(obj, prop) {
    const value = obj[prop]
    debug('get', {prop, value})
    return value === undefined ? null : value
  }
})

Then merge is used in this example [ref]:

  const sandbox: { [ind: string]: any } = merge(
    ctx.jsSandbox || {},
    data,
    additionalJsContext
  );

The generic "get" and "set" are not being merged into the sandbox object. If I put static properties in the 1st argument to Proxy it works or if I test my proxy alone additionalJsContext.anyprop === null it works. I'm not concerned about Proxy immutability, I can handle that with the set.