https://www.graalvm.org/ 
public class com.oracle.svm.hosted.LoggingFeature$Options
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.oracle.svm.hosted.LoggingFeature$Options
  super_class: java.lang.Object
{
  public static final com.oracle.svm.core.option.HostedOptionKey<java.lang.Boolean> EnableLoggingFeature;
    descriptor: Lcom/oracle/svm/core/option/HostedOptionKey;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    Signature: Lcom/oracle/svm/core/option/HostedOptionKey<Ljava/lang/Boolean;>;
    RuntimeInvisibleAnnotations: 
      org.graalvm.compiler.options.Option(help = {"Enable the feature that provides support for logging."})

  public static final com.oracle.svm.core.option.HostedOptionKey<java.lang.Boolean> TraceLoggingFeature;
    descriptor: Lcom/oracle/svm/core/option/HostedOptionKey;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    Signature: Lcom/oracle/svm/core/option/HostedOptionKey<Ljava/lang/Boolean;>;
    RuntimeInvisibleAnnotations: 
      org.graalvm.compiler.options.Option(help = {"When enabled, logging feature details are printed."}, type = org.graalvm.compiler.options.OptionType.Debug:Lorg/graalvm/compiler/options/OptionType;)

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 44
            new com.oracle.svm.core.option.HostedOptionKey
            dup
            iconst_1
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            invokespecial com.oracle.svm.core.option.HostedOptionKey.<init>:(Ljava/lang/Object;)V
            putstatic com.oracle.svm.hosted.LoggingFeature$Options.EnableLoggingFeature:Lcom/oracle/svm/core/option/HostedOptionKey;
         1: .line 47
            new com.oracle.svm.core.option.HostedOptionKey
            dup
            iconst_0
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            invokespecial com.oracle.svm.core.option.HostedOptionKey.<init>:(Ljava/lang/Object;)V
            putstatic com.oracle.svm.hosted.LoggingFeature$Options.TraceLoggingFeature:Lcom/oracle/svm/core/option/HostedOptionKey;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.svm.hosted.LoggingFeature$Options this
         0: .line 42
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.svm.hosted.LoggingFeature$Options this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/hosted/LoggingFeature$Options;
}
SourceFile: "LoggingFeature.java"
NestHost: com.oracle.svm.hosted.LoggingFeature
InnerClasses:
  public Options = com.oracle.svm.hosted.LoggingFeature$Options of com.oracle.svm.hosted.LoggingFeature