void complete() {
      try {
        writeFile();
      } catch (Exception ex) {
        EnvironmentState.processing().getMessager().printMessage(
            Diagnostic.Kind.MANDATORY_WARNING,
            "Cannot write service files: " + key + ex);
      }
    }
Pragma-like comment indicator just at beginning of the source file used to disable import
post-processing.
generator/src/org/immutables/generator/Output.java