getColumnDescriptors (ip,op) arg_tableName = do
  send_getColumnDescriptors op arg_tableName
  recv_getColumnDescriptors ip
getColumnDescriptors (ip,op) arg_tableName = do
  send_getColumnDescriptors op arg_tableName
  recv_getColumnDescriptors ip
getColumnDescriptors (ip,op) arg_tableName = do
  send_getColumnDescriptors op arg_tableName
  recv_getColumnDescriptors ip