code: function baseFor(object, callback, keysFunc) {
        var index = -1,
            props = keysFunc(object),
            length = props.length;
  
        while (++index < length) {
          var key = props[index];
          if (callback(object[key], key, object) === false) {
            break;
          }
        }
        return object;
      }
docs: The base implementation of `baseForIn` and `baseForOwn` which iterates
  over `object` properties returned by `keysFunc` executing the callback
  for each property. Callbacks may exit iteration early by explicitly
  returning `false`.
  
  @private
  @param {Object} object The object to iterate over.
  @param {Function} callback The function called per iteration.
  @param {Function} keysFunc The function to get the keys of `object`.
  @returns {Object} Returns `object`.