warning: unused import "b.proto"
  --> a2.proto:4:8
   |
 4 | import "b.proto";
   |        ^^^^^^^^^
  help: delete it
   |
 4 | - import "b.proto";
   |
   = help: no symbols from this file are referenced

warning: unused import "c.proto"
  --> a2.proto:5:8
   |
 5 | import "c.proto";
   |        ^^^^^^^^^
  help: delete it
   |
 5 | - import "c.proto";
   |
   = help: no symbols from this file are referenced

warning: unused import "d.proto"
  --> a2.proto:6:8
   |
 6 | import "d.proto";
   |        ^^^^^^^^^
  help: delete it
   |
 6 | - import "d.proto";
   |
   = help: no symbols from this file are referenced

warning: unused import "c.proto"
  --> a3.proto:5:8
   |
 5 | import "c.proto";
   |        ^^^^^^^^^
  help: delete it
   |
 5 | - import "c.proto";
   |
   = help: no symbols from this file are referenced

warning: unused import "c.proto"
  --> a4.proto:5:8
   |
 5 | import "c.proto";
   |        ^^^^^^^^^
  help: delete it
   |
 5 | - import "c.proto";
   |
   = help: no symbols from this file are referenced

warning: unused import "c.proto"
  --> a8.proto:5:8
   |
 5 | import "c.proto";
   |        ^^^^^^^^^
  help: delete it
   |
 5 | - import "c.proto";
   |
   = help: no symbols from this file are referenced

encountered 6 warnings
