https://tomcat.apache.org/: Tomcat Servlet Engine Core Classes and Standard implementations 
class org.apache.catalina.core.AsyncContextImpl$DebugException extends java.lang.Exception
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.catalina.core.AsyncContextImpl$DebugException
  super_class: java.lang.Exception
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.catalina.core.AsyncContextImpl$DebugException this
         0: .line 527
            aload 0 /* this */
            invokespecial java.lang.Exception.<init>:()V
            return
        end local 0 // org.apache.catalina.core.AsyncContextImpl$DebugException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/catalina/core/AsyncContextImpl$DebugException;
}
SourceFile: "AsyncContextImpl.java"
NestHost: org.apache.catalina.core.AsyncContextImpl
InnerClasses:
  private DebugException = org.apache.catalina.core.AsyncContextImpl$DebugException of org.apache.catalina.core.AsyncContextImpl