code: function(input) {
          if (input.length !== 0) {
              // with an empty Uint8Array, Opera fails with a "Offset larger than array size"
              input = utils.transformTo("uint8array", input);
              this.data.set(input, this.index);
              this.index += input.length;
          }
      }
docs: Append any content to the current array.
  @param {Object} input the content to add.