func doPrint:any
  fvar(old)
  old = block.select(BLK_PRIV_MTD)  
  println('function printCode(var data:TData):TData;')
  block.select(BLK_MTD_BODY)
  println('function ' + CUR_CLASS + '.printCode;')
  println(code(_arr.join(Lines, "\r\n")))
  block.select(BLK_UNITS)
  print(',messages')
  block.select(old)
  println('printCode(data);')
  event(onPrint)
end