http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
public interface io.undertow.server.protocol.framed.FrameHeaderData
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.undertow.server.protocol.framed.FrameHeaderData
  super_class: java.lang.Object
{
  public abstract long getFrameLength();
    descriptor: ()J
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract io.undertow.server.protocol.framed.AbstractFramedStreamSourceChannel<?, ?, ?> getExistingChannel();
    descriptor: ()Lio/undertow/server/protocol/framed/AbstractFramedStreamSourceChannel;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Lio/undertow/server/protocol/framed/AbstractFramedStreamSourceChannel<***>;
}
SourceFile: "FrameHeaderData.java"