  --> [ local path prefix ]/tlm_channel/not_displayable.fpp:19:16
   |
19 |   telemetry C: S1
   |                ^^ type of telemetry channel is not displayable
   |
  ::: [ local path prefix ]/tlm_channel/not_displayable.fpp:6:16
   |
 6 | struct S1 { x: S2 }
   |                -- because this type is not displayable
   |
  ::: [ local path prefix ]/tlm_channel/not_displayable.fpp:8:16
   |
 8 | struct S2 { x: A1 }
   |                -- because this type is not displayable
   |
  ::: [ local path prefix ]/tlm_channel/not_displayable.fpp:10:16
   |
10 | array A1 = [3] A2
   |                -- because this type is not displayable
   |
  ::: [ local path prefix ]/tlm_channel/not_displayable.fpp:12:16
   |
12 | array A2 = [3] T
   |                - because this type is not displayable
   |
  ::: [ local path prefix ]/tlm_channel/not_displayable.fpp:14:1
   |
14 | type T
   | ------ type is defined here

