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

  public abstract void setContainer(org.apache.catalina.Container);
    descriptor: (Lorg/apache/catalina/Container;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
           Name  Flags
      container  
}
SourceFile: "Contained.java"