code: function basePullAll(array, values, iteratee, comparator) {
          var indexOf = comparator ? baseIndexOfWith : baseIndexOf, index = -1, length = values.length, seen = array;
          if (iteratee) {
            seen = arrayMap(array, baseUnary(iteratee));
          }
          while (++index < length) {
            var fromIndex = 0, value = values[index], computed = iteratee ? iteratee(value) : value;
            while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
              if (seen !== array) {
                splice.call(seen, fromIndex, 1);
              }
              splice.call(array, fromIndex, 1);
            }
          }
          return array;
        }
docs: The base implementation of `_.pullAllBy` without support for iteratee
  shorthands.
  
  @private
  @param {Array} array The array to modify.
  @param {Array} values The values to remove.
  @param {Function} [iteratee] The iteratee invoked per element.
  @param {Function} [comparator] The comparator invoked per element.
  @returns {Array} Returns `array`.