private void parsed(int length, String message) {
    observer.parsed(bytes, parseCursor, length, message);
    parseCursor += length;
  }
Helper which indicates that some bytes were just parsed. This should only be used (for
efficiency sake) if the parse is known to be observed.

@param length {@code >= 0;} number of bytes parsed
@param message {@code non-null;} associated message
android/android_framework/dex-maker/src/main/java/com/android/dx/cf/direct/AnnotationParser.java