/**
         * @param op The option of condition to be set up. (NotNull)
         */
        void callback(OP op);
    }

    @FunctionalInterface
    public interface OperatorCall<CA extends EsAbstractConditionAggregation> {

        void callback(CA query);
    }

        }
        response.request
      }
    val blockingAuthClient =
      client
        .newBuilder()
        .authenticator(authenticator)
        .build()
    val callback: Callback =
      object : Callback {
        override fun onFailure(
          call: Call,
          e: IOException,
        ) {
          fail("")
        }

        override fun onResponse(

import java.util.concurrent.CompletableFuture
import java.util.concurrent.RejectedExecutionException
import java.util.concurrent.TimeUnit
import kotlin.test.assertFailsWith
import okhttp3.Call
import okhttp3.Callback
import okhttp3.DelegatingServerSocketFactory
import okhttp3.DelegatingSocketFactory
import okhttp3.OkHttpClient
import okhttp3.OkHttpClientTestRule
import okhttp3.Request
import okhttp3.RequestBody

     */
    protected void writeJsonResponse(final int status, final String body) {
        final String callback = LaRequestUtil.getOptionalRequest().map(req -> req.getParameter("callback")).orElse(null);
        final boolean isJsonp = ComponentUtil.getFessConfig().isApiJsonpEnabled() && StringUtil.isNotBlank(callback);

        final HttpServletResponse response = LaResponseUtil.getResponse();
        response.setStatus(status);

        @Override
        public int load() {
            loadCallCount.incrementAndGet();
            return loadCallback.call();
        }

        public void setLoadCallback(LoadCallback callback) {
            this.loadCallback = callback;
        }

        public int getLoadCallCount() {
            return loadCallCount.get();
        }
    }

    @FunctionalInterface
    interface LoadCallback {

	return nil
}

func TestCallback(t *testing.T) {
	user, err := schema.Parse(&UserWithCallback{}, &sync.Map{}, schema.NamingStrategy{})
	if err != nil {
		t.Fatalf("failed to parse user with callback, got error %v", err)
	}

	for _, str := range []string{"BeforeSave", "AfterCreate"} {
		if !reflect.Indirect(reflect.ValueOf(user)).FieldByName(str).Interface().(bool) {
			t.Errorf("%v should be true", str)
		}
	}

}
```

#### 4.5.2 Fallback TCP Provider
```java
package jcifs.internal.smb2.rdma.tcp;

public class TcpRdmaProvider implements RdmaProvider {
    @Override
    public boolean isAvailable() {
        return true;  // TCP is always available
    }
    
    @Override
    public Set<RdmaCapability> getSupportedCapabilities() {
        // TCP fallback only supports send/receive

import kotlinx.coroutines.withTimeout
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.SocketEffect
import mockwebserver3.junit5.StartStop
import okhttp3.Callback
import okhttp3.FailingCall
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.OkHttpClientTestRule
import okhttp3.Protocol
import okhttp3.Request
import okhttp3.Response
import okhttp3.ResponseBody

    }

    @Override
    public MavenOptions interpolate(UnaryOperator<String> callback) {
        ArrayList<MavenOptions> interpolatedOptions = new ArrayList<>(options.size());
        for (MavenOptions o : options) {
            interpolatedOptions.add((MavenOptions) o.interpolate(callback));
        }
        return layerMavenOptions(interpolatedOptions);
    }

        /**
         * @param op The option of condition to be set up. (NotNull)
         */
        void callback(OP op);
    }

    @FunctionalInterface
    public interface OperatorCall<CA extends EsAbstractConditionAggregation> {

        void callback(CA query);
    }