https://tomcat.apache.org/: Tomcat Core Logging Package 
public class org.apache.juli.ClassLoaderLogManager$RootLogger extends java.util.logging.Logger
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.juli.ClassLoaderLogManager$RootLogger
  super_class: java.util.logging.Logger
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.apache.juli.ClassLoaderLogManager$RootLogger this
         0: .line 775
            aload 0 /* this */
            ldc ""
            aconst_null
            invokespecial java.util.logging.Logger.<init>:(Ljava/lang/String;Ljava/lang/String;)V
         1: .line 776
            return
        end local 0 // org.apache.juli.ClassLoaderLogManager$RootLogger this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/juli/ClassLoaderLogManager$RootLogger;
}
SourceFile: "ClassLoaderLogManager.java"
NestHost: org.apache.juli.ClassLoaderLogManager
InnerClasses:
  protected RootLogger = org.apache.juli.ClassLoaderLogManager$RootLogger of org.apache.juli.ClassLoaderLogManager