function assignOriginal(wrapped, original, forceOrig) {
  wrapped[symbols.wrapped] = this.id
  if (!wrapped[symbols.original] || forceOrig) {
    wrapped[symbols.original] = original
  }
}
Assigns the shim id and original on the wrapped item.
TODO: Once all wrapping is converted to proxies, we won't need to
set this property as the trap on 'get' will return the original for
symbols.original. For now, we have to prevent setting this on original.

@param {*} wrapped wrapped item
@param {*} original * The item being wrapped.
@param {boolean} forceOrig flag to indicate to overwrite original function
@memberof Shim.prototype