code: function (value) {
          if (value === null || value === undefined) {
              return this.slot.keys.length;
          } else {
              assertType(value, Number);
  
              if (value !== this.slot.keys.length) {
                  if (value < this.slot.size) {
                      error(ERROR_ARGUMENT_OUT_OF_RANGE);
                  }
  
                  this.slot.keys.length = value;
                  this.slot.values.length = value;
              }
          }
      }
docs: Gets or sets the number of elements that the SortedList can contain.
  @param {Number} value The number of elements that the SortedList can contain.
  @returns {Number}