https://www.graalvm.org/ 
public final class com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy extends com.oracle.truffle.api.instrumentation.TruffleInstrument
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy
  super_class: com.oracle.truffle.api.instrumentation.TruffleInstrument
{
  private com.oracle.truffle.api.instrumentation.TruffleInstrument$Env env;
    descriptor: Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env;
    flags: (0x0002) ACC_PRIVATE

  private final java.lang.Object replacedValue;
    descriptor: Ljava/lang/Object;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy this
         0: .line 836
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.instrumentation.TruffleInstrument.<init>:()V
         1: .line 839
            aload 0 /* this */
            new com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy$ReplacedTruffleObjectLegacy
            dup
            invokespecial com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy$ReplacedTruffleObjectLegacy.<init>:()V
            putfield com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy.replacedValue:Ljava/lang/Object;
         2: .line 836
            return
        end local 0 // com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/sl/test/SLInstrumentLegacyTest$NewReplacedInstrumentLegacy;

  protected void onCreate(com.oracle.truffle.api.instrumentation.TruffleInstrument$Env);
    descriptor: (Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy this
        start local 1 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env env
         0: .line 844
            aload 0 /* this */
            aload 1 /* env */
            putfield com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy.env:Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env;
         1: .line 845
            aload 1 /* env */
            aload 0 /* this */
            invokevirtual com.oracle.truffle.api.instrumentation.TruffleInstrument$Env.registerService:(Ljava/lang/Object;)V
         2: .line 846
            return
        end local 1 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env env
        end local 0 // com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/sl/test/SLInstrumentLegacyTest$NewReplacedInstrumentLegacy;
            0    3     1   env  Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env;
    MethodParameters:
      Name  Flags
      env   

  void attachAt(com.oracle.truffle.api.source.SourceSection);
    descriptor: (Lcom/oracle/truffle/api/source/SourceSection;)V
    flags: (0x0000) 
    Code:
      stack=6, locals=2, args_size=2
        start local 0 // com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy this
        start local 1 // com.oracle.truffle.api.source.SourceSection ss
         0: .line 849
            aload 0 /* this */
            getfield com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy.env:Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env;
            invokevirtual com.oracle.truffle.api.instrumentation.TruffleInstrument$Env.getInstrumenter:()Lcom/oracle/truffle/api/instrumentation/Instrumenter;
            invokestatic com.oracle.truffle.api.instrumentation.SourceSectionFilter.newBuilder:()Lcom/oracle/truffle/api/instrumentation/SourceSectionFilter$Builder;
            iconst_1
            anewarray com.oracle.truffle.api.source.SourceSection
            dup
            iconst_0
            aload 1 /* ss */
            aastore
            invokevirtual com.oracle.truffle.api.instrumentation.SourceSectionFilter$Builder.sourceSectionEquals:([Lcom/oracle/truffle/api/source/SourceSection;)Lcom/oracle/truffle/api/instrumentation/SourceSectionFilter$Builder;
            invokevirtual com.oracle.truffle.api.instrumentation.SourceSectionFilter$Builder.build:()Lcom/oracle/truffle/api/instrumentation/SourceSectionFilter;
            new com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy$1
            dup
            aload 0 /* this */
            invokespecial com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy$1.<init>:(Lcom/oracle/truffle/sl/test/SLInstrumentLegacyTest$NewReplacedInstrumentLegacy;)V
            invokevirtual com.oracle.truffle.api.instrumentation.Instrumenter.attachExecutionEventListener:(Lcom/oracle/truffle/api/instrumentation/SourceSectionFilter;Lcom/oracle/truffle/api/instrumentation/ExecutionEventListener;)Lcom/oracle/truffle/api/instrumentation/EventBinding;
            pop
         1: .line 872
            return
        end local 1 // com.oracle.truffle.api.source.SourceSection ss
        end local 0 // com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/sl/test/SLInstrumentLegacyTest$NewReplacedInstrumentLegacy;
            0    2     1    ss  Lcom/oracle/truffle/api/source/SourceSection;
    MethodParameters:
      Name  Flags
      ss    
}
SourceFile: "SLInstrumentLegacyTest.java"
NestHost: com.oracle.truffle.sl.test.SLInstrumentLegacyTest
InnerClasses:
  public final Builder = com.oracle.truffle.api.instrumentation.SourceSectionFilter$Builder of com.oracle.truffle.api.instrumentation.SourceSectionFilter
  public final Env = com.oracle.truffle.api.instrumentation.TruffleInstrument$Env of com.oracle.truffle.api.instrumentation.TruffleInstrument
  public abstract Registration = com.oracle.truffle.api.instrumentation.TruffleInstrument$Registration of com.oracle.truffle.api.instrumentation.TruffleInstrument
  public final NewReplacedInstrumentLegacy = com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy of com.oracle.truffle.sl.test.SLInstrumentLegacyTest
  com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy$1
  ReplacedTruffleObjectLegacy = com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy$ReplacedTruffleObjectLegacy of com.oracle.truffle.sl.test.SLInstrumentLegacyTest$NewReplacedInstrumentLegacy
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.instrumentation.TruffleInstrument$Registration(id = "testNewNodeReplacedLegacy", services = {Lcom/oracle/truffle/sl/test/SLInstrumentLegacyTest$NewReplacedInstrumentLegacy;})