https://tomcat.apache.org/: Tomcat Servlet Engine Core Classes and Standard implementations 
public interface org.apache.catalina.Valve
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.apache.catalina.Valve
  super_class: java.lang.Object
{
  public abstract org.apache.catalina.Valve getNext();
    descriptor: ()Lorg/apache/catalina/Valve;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void setNext(org.apache.catalina.Valve);
    descriptor: (Lorg/apache/catalina/Valve;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      valve  

  public abstract void backgroundProcess();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void invoke(org.apache.catalina.connector.Request, org.apache.catalina.connector.Response);
    descriptor: (Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.io.IOException, javax.servlet.ServletException
    MethodParameters:
          Name  Flags
      request   
      response  

  public abstract boolean isAsyncSupported();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "Valve.java"