super(delegate, mutex);
    }

    @SuppressWarnings("unchecked")
    @Override
    Collection<E> delegate() {
      return (Collection<E>) super.delegate();
    }

    @Override
    public boolean add(E e) {
      synchronized (mutex) {
        return delegate().add(e);
      }
    }

    @Override
    public boolean addAll(Collection<? extends E> c) {
      synchronized (mutex) {

        @Override
        public java.util.Enumeration<String> getAttributeNames() {
            return null;
        }

        @Override
        public String getContextPath() {
            return "";
        }

        @Override
        public jakarta.servlet.ServletContext getContext(String uripath) {
            return null;
        }

        @Override
        public int getMajorVersion() {

    @Override
    public String getArtifactId() {
        return artifact.getArtifactId();
    }

    /** {@inheritDoc} */
    @Override
    public String getVersion() {
        return artifact.getVersion();
    }

    /** {@inheritDoc} */
    @Override
    public void setVersion(String version) {
        artifact.setVersion(version);
    }

    /** {@inheritDoc} */
    @Override

        @Override
        public String getQuery() {
            return query;
        }

        @Override
        public Map<String, String[]> getFields() {
            return fields;
        }

        @Override
        public Map<String, String[]> getConditions() {
            return conditions;
        }

        @Override
        public String[] getLanguages() {

        @Override
        public String getCharacterEncoding() {
            return null;
        }

        @Override
        public void setCharacterEncoding(String env) {
        }

        @Override
        public int getContentLength() {
            return 0;
        }

        @Override
        public long getContentLengthLong() {
            return 0;
        }

        @Override

      checkValid(k);
    }
  }

  @Override
  public @Nullable Entry<K, V> ceilingEntry(K key) {
    return delegate.ceilingEntry(checkValid(key));
  }

  @Override
  public @Nullable K ceilingKey(K key) {
    return delegate.ceilingKey(checkValid(key));
  }

  @Override
  public void clear() {
    delegate.clear();
  }

  @Override
  public Comparator<? super K> comparator() {

            this.exitValue = exitValue;
        }

        @Override
        public int waitFor() throws InterruptedException {
            return exitValue;
        }

        @Override
        public int exitValue() {
            return exitValue;
        }

        @Override
        public void destroy() {
        }

        @Override
        public java.io.OutputStream getOutputStream() {

class OverrideResponse(JSONResponse):
    media_type = "application/x-override"


app = FastAPI(default_response_class=ORJSONResponse)
router_a = APIRouter()
router_a_a = APIRouter()
router_a_b_override = APIRouter()  # Overrides default class
router_b_override = APIRouter()  # Overrides default class
router_b_a = APIRouter()
router_b_a_c_override = APIRouter()  # Overrides default class again


@app.get("/")
def get_root():

            this.output = output;
        }

        @Override
        public void start() {
            // Override start to do nothing in test - simulate immediate completion
        }

        @Override
        public void run() {
            // Override run to do nothing in test
        }

        @Override
        public String getOutput() {
            return output;
        }

  }

  @Override
  public Iterator<E> iterator() {
    return delegate.iterator();
  }

  @Override
  public E last() {
    return delegate.last();
  }

  @Override
  public @Nullable E lower(E e) {
    return delegate.lower(checkValid(e));
  }

  @Override
  public @Nullable E pollFirst() {
    return delegate.pollFirst();
  }

  @Override