https://openjdk.java.net/ 
public interface java.net.http.HttpResponse$BodySubscriber<T> extends java.util.concurrent.Flow$Subscriber<java.util.List<java.nio.ByteBuffer>>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: java.net.http.HttpResponse$BodySubscriber
  super_class: java.lang.Object
{
  public abstract java.util.concurrent.CompletionStage<T> getBody();
    descriptor: ()Ljava/util/concurrent/CompletionStage;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/concurrent/CompletionStage<TT;>;
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;Ljava/util/concurrent/Flow$Subscriber<Ljava/util/List<Ljava/nio/ByteBuffer;>;>;
SourceFile: "HttpResponse.java"
NestHost: java.net.http.HttpResponse
InnerClasses:
  public abstract BodySubscriber = java.net.http.HttpResponse$BodySubscriber of java.net.http.HttpResponse
  public abstract Subscriber = java.util.concurrent.Flow$Subscriber of java.util.concurrent.Flow