whole_func_string: function length(buffer, n, special) {
    var len = this.getLengthEncoding(n, special);
    return Buffer.concat([len, buffer], len.length + buffer.length);
  }
func_code_string: function length(buffer, n, special) {
    var len = this.getLengthEncoding(n, special);
    return Buffer.concat([len, buffer], len.length + buffer.length);
  }
func_documentation_string: Concatenate a buffer with length encoding.