 --> [ local path prefix ]/top_import/deployment_topology.fpp:2:15
  |
2 | topology T2 { instance T1 }
  |               ^^^^^^^^^^^ invalid use of symbol T1: use of deployment topology is not allowed here
  |
 ::: [ local path prefix ]/top_import/deployment_topology.fpp:1:1
  |
1 | deployment topology T1 {}
  | ------------------------- T1 defined here

