warning: required fields are deprecated
  --> testdata/editions/ok.proto:12:44
   |
12 |     int32 z = 3 [features.field_presence = LEGACY_REQUIRED];
   |                                            ^^^^^^^^^^^^^^^
   = help: do not attempt to change this to `EXPLICIT` if the field is already
           in-use; doing so is a wire protocol break

encountered 1 warning