https://tomcat.apache.org/: Tomcat Servlet Engine Core Classes and Standard implementations 
class org.apache.catalina.manager.HTMLManagerServlet$10 extends org.apache.catalina.manager.util.BaseSessionComparator<java.util.Date>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.catalina.manager.HTMLManagerServlet$10
  super_class: org.apache.catalina.manager.util.BaseSessionComparator
{
  final org.apache.catalina.manager.HTMLManagerServlet this$0;
    descriptor: Lorg/apache/catalina/manager/HTMLManagerServlet;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(org.apache.catalina.manager.HTMLManagerServlet);
    descriptor: (Lorg/apache/catalina/manager/HTMLManagerServlet;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.catalina.manager.HTMLManagerServlet$10 this
         0: .line 1144
            aload 0 /* this */
            aload 1
            putfield org.apache.catalina.manager.HTMLManagerServlet$10.this$0:Lorg/apache/catalina/manager/HTMLManagerServlet;
            aload 0 /* this */
            invokespecial org.apache.catalina.manager.util.BaseSessionComparator.<init>:()V
            return
        end local 0 // org.apache.catalina.manager.HTMLManagerServlet$10 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/catalina/manager/HTMLManagerServlet$10;
    MethodParameters:
        Name  Flags
      this$0  final

  public java.lang.Comparable<java.util.Date> getComparableObject(org.apache.catalina.Session);
    descriptor: (Lorg/apache/catalina/Session;)Ljava/lang/Comparable;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.apache.catalina.manager.HTMLManagerServlet$10 this
        start local 1 // org.apache.catalina.Session session
         0: .line 1147
            new java.util.Date
            dup
            aload 1 /* session */
            invokestatic org.apache.catalina.manager.util.SessionUtils.getTTLForSession:(Lorg/apache/catalina/Session;)J
            invokespecial java.util.Date.<init>:(J)V
            areturn
        end local 1 // org.apache.catalina.Session session
        end local 0 // org.apache.catalina.manager.HTMLManagerServlet$10 this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lorg/apache/catalina/manager/HTMLManagerServlet$10;
            0    1     1  session  Lorg/apache/catalina/Session;
    Signature: (Lorg/apache/catalina/Session;)Ljava/lang/Comparable<Ljava/util/Date;>;
    MethodParameters:
         Name  Flags
      session  
}
Signature: Lorg/apache/catalina/manager/util/BaseSessionComparator<Ljava/util/Date;>;
SourceFile: "HTMLManagerServlet.java"
EnclosingMethod: org.apache.catalina.manager.HTMLManagerServlet.getComparator:(Ljava/lang/String;)Ljava/util/Comparator;
NestHost: org.apache.catalina.manager.HTMLManagerServlet
InnerClasses:
  org.apache.catalina.manager.HTMLManagerServlet$10