Adds missing method implementations

spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/support/DefaultClientResponse.java

@@ -40,6 +40,7 @@ import org.springframework.web.reactive.function.BodyExtractor;
 import org.springframework.web.reactive.function.BodyExtractors;
 import org.springframework.web.reactive.function.client.ClientResponse;
 import org.springframework.web.reactive.function.client.ExchangeStrategies;
+import org.springframework.web.reactive.function.client.WebClientResponseException;
 
 /**
  * Default implementation of {@link ClientResponse}.
@@ -120,6 +121,24 @@ public class DefaultClientResponse implements ClientResponse {
 		}
 	}
 
+	@Override
+	public Mono<Void> releaseBody() {
+		return body(BodyExtractors.toDataBuffers())
+				.map(DataBufferUtils::release)
+				.then();
+	}
+
+	@Override
+	public Mono<ResponseEntity<Void>> toBodilessEntity() {
+		return releaseBody()
+				.then(toEntityInternal(Mono.empty()));
+	}
+
+	@Override
+	public Mono<WebClientResponseException> createException() {
+		throw new UnsupportedOperationException();
+	}
+
 	@SuppressWarnings("unchecked")
 	private <T> Mono<T> consumeAndCancel() {
 		return (Mono<T>) this.response.getBody().map(buffer -> {

spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/support/DefaultServerResponse.java

@@ -64,6 +64,11 @@ public class DefaultServerResponse<T> implements ServerResponse {
 		return HttpStatus.valueOf(response().getStatusCode().value());
 	}
 
+	@Override
+	public int rawStatusCode() {
+		return response().getStatusCode().value();
+	}
+
 	@Override
 	public final HttpHeaders headers() {
 		return response().getHeaders();