code: function push(element) {
      /* jshint validthis:true */
      var i;
  
      if (arguments.length === 1) {
          pushSingle(this, element);
      } else {
          for (i = 0; i < arguments.length; i++) {
              pushSingle(this, arguments[i]);
          }
      }
  
      return this.length;
  }
docs: Adds the given element(s) at their sortedIndex.
  
  Same signature as Array.prototype.push
  @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/push