code: public static <T extends Tree> Matcher<T> hasAnnotation(final String annotationClass) {
      return new Matcher<T>() {
        @Override
        public boolean matches(T tree, VisitorState state) {
          return ASTHelpers.hasAnnotation(ASTHelpers.getDeclaredSymbol(tree), annotationClass, state);
        }
      };
    }
docs: Determines whether an expression has an annotation of the given type. This includes annotations
  inherited from superclasses due to @Inherited.
  
  @param annotationClass the binary class name of the annotation (e.g.
  "javax.annotation.Nullable", or "some.package.OuterClassName$InnerClassName")