@FormatMethod
  void reportNote(Element e, String format, Object... args) {
    messager.printMessage(Diagnostic.Kind.NOTE, String.format(format, args), e);
  }
Issue a compilation note.

@param e the element to which it pertains
@param format the format string for the text of the note
@param args arguments for the format string
value/src/main/java/com/google/auto/value/processor/ErrorReporter.java