src/Obs.js
function observeObject(o, observer) {
  return o && typeof o === 'object' && observe(o, observer, observer.keys);
}
function observeObject(o, observer) {
  return o && typeof o === 'object' && observe(o, observer, observer.keys);
}
function observeObject ( o , observer ) { return o && typeof o === 'object' && observe ( o , observer , observer . keys ) ; }
Invoke Object.observe with only the types available to be handled.
Invoke Object . observe with only the types available to be handled .