code: function equals(x, y) {
      let rc = new RecurseCounter(1000);
      return _equals.call(null, x, y, rc);
  }
docs: Compares the equality of two items.
  
  @param x The first item to compare.
  @param y The second item to compare.
  @returns {boolean} An indication as to whether or not x and y were equal.