  --> [ local path prefix ]/tlm_packets/duplicate_id_explicit.fpp:12:5
   |
12 | /     packet P2 id 0 group 1 {
13 | |       c2.T
14 | |     }
   | |_____^ duplicate identifier value (0 dec, 0 hex)
   |
  ::: [ local path prefix ]/tlm_packets/duplicate_id_explicit.fpp:8:5
   |
 8 | /     packet P1 id 0 group 0 {
 9 | |       c1.T
10 | |     }
   | |_____- previous occurrence is here

