https://openjdk.java.net/ 
public interface jdk.incubator.http.internal.common.BufferHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: jdk.incubator.http.internal.common.BufferHandler
  super_class: java.lang.Object
{
  public abstract java.nio.ByteBuffer getBuffer();
    descriptor: ()Ljava/nio/ByteBuffer;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void returnBuffer(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      buffer  
}
SourceFile: "BufferHandler.java"