code: function concat(list, totalLength) {
    if (list.length === 0) return EMPTY_BUFFER;
    if (list.length === 1) return list[0];
  
    const target = Buffer.allocUnsafe(totalLength);
    let offset = 0;
  
    for (let i = 0; i < list.length; i++) {
      const buf = list[i];
      buf.copy(target, offset);
      offset += buf.length;
    }
  
    return target;
  }
docs: Merges an array of buffers into a new buffer.
  
  @param {Buffer[]} list The array of buffers to concat
  @param {Number} totalLength The total length of buffers in the list
  @return {Buffer} The resulting buffer
  @public