http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
public interface io.undertow.attribute.ExchangeAttribute
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.undertow.attribute.ExchangeAttribute
  super_class: java.lang.Object
{
  public abstract java.lang.String readAttribute(io.undertow.server.HttpServerExchange);
    descriptor: (Lio/undertow/server/HttpServerExchange;)Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
          Name  Flags
      exchange  final

  public abstract void writeAttribute(io.undertow.server.HttpServerExchange, java.lang.String);
    descriptor: (Lio/undertow/server/HttpServerExchange;Ljava/lang/String;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws io.undertow.attribute.ReadOnlyAttributeException
    MethodParameters:
          Name  Flags
      exchange  final
      newValue  final
}
SourceFile: "ExchangeAttribute.java"