public boolean isEmpty() {
    return (classAnnotations == null)
        && (fieldAnnotations == null)
        && (methodAnnotations == null)
        && (parameterAnnotations == null);
  }
Returns whether this item is empty (has no contents).

@return {@code true} if this item is empty, or {@code false} if not
android/android_framework/dex-maker/src/main/java/com/android/dx/dex/file/AnnotationsDirectoryItem.java