/**
 * a utility method that will walk the object for the provided properties
 * safely asserting if the final property is equal to `other`
 * @param {Object} obj
 * @param {Array} steps
 * @param {Object} other
 * @returns {boolean} true only if properties exist for object to
 * be walked and final prop is equal to `other`
 */
function walkEquals(obj, steps, other){
  if(!obj){
    return false;
  }

  for(let i=0; i<steps.length; i++){
    const next = obj[steps[i]];
    if(!next){
      return false;
    }
    obj = next;
  }

  return obj === other;
}