Expose BodyInserter in EntityResponse

spring-webflux/src/main/java/org/springframework/web/reactive/function/server/DefaultEntityResponseBuilder.java

@@ -196,6 +196,11 @@ class DefaultEntityResponseBuilder<T> implements EntityResponse.Builder<T> {
 			return this.entity;
 		}
 
+		@Override
+		public BodyInserter<T, ? super ServerHttpResponse> inserter() {
+			return this.inserter;
+		}
+
 		@Override
 		public Mono<Void> writeTo(ServerWebExchange exchange, HandlerStrategies strategies) {
 			ServerHttpResponse response = exchange.getResponse();

spring-webflux/src/main/java/org/springframework/web/reactive/function/server/EntityResponse.java

@@ -30,6 +30,8 @@ import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.codec.json.AbstractJackson2Codec;
+import org.springframework.http.server.reactive.ServerHttpResponse;
+import org.springframework.web.reactive.function.BodyInserter;
 import org.springframework.web.reactive.function.BodyInserters;
 
 /**
@@ -45,6 +47,11 @@ public interface EntityResponse<T> extends ServerResponse {
 	 */
 	T entity();
 
+	/**
+	 * Return the {@code BodyInserter} that writes the entity to the output stream.
+	 */
+	BodyInserter<T, ? super ServerHttpResponse> inserter();
+
 	// Static builder methods
 
 	/**