https://www.graalvm.org/ 
class org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1 implements com.oracle.truffle.api.frame.FrameInstanceVisitor<java.lang.Object>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1
  super_class: java.lang.Object
{
  int frameIndex;
    descriptor: I
    flags: (0x0000) 

  private final java.lang.StringBuilder val$messageBuilder;
    descriptor: Ljava/lang/StringBuilder;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  private final int val$limit;
    descriptor: I
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(java.lang.StringBuilder, int);
    descriptor: (Ljava/lang/StringBuilder;I)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1 this
         0: .line 529
            aload 0 /* this */
            aload 1
            putfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.val$messageBuilder:Ljava/lang/StringBuilder;
            aload 0 /* this */
            iload 2
            putfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.val$limit:I
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 530
            aload 0 /* this */
            iconst_0
            putfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.frameIndex:I
         2: .line 529
            return
        end local 0 // org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/graalvm/compiler/truffle/runtime/hotspot/AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1;
    MethodParameters:
                    Name  Flags
      val$messageBuilder  final
      val$limit           final

  public java.lang.Object visitFrame(com.oracle.truffle.api.frame.FrameInstance);
    descriptor: (Lcom/oracle/truffle/api/frame/FrameInstance;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=2
        start local 0 // org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1 this
        start local 1 // com.oracle.truffle.api.frame.FrameInstance frameInstance
         0: .line 534
            aload 1 /* frameInstance */
            invokeinterface com.oracle.truffle.api.frame.FrameInstance.getCallTarget:()Lcom/oracle/truffle/api/CallTarget;
            astore 2 /* target */
        start local 2 // com.oracle.truffle.api.CallTarget target
         1: .line 535
            new java.lang.StringBuilder
            dup
            ldc "  "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            astore 3 /* line */
        start local 3 // java.lang.StringBuilder line
         2: .line 536
            aload 0 /* this */
            getfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.frameIndex:I
            ifle 4
         3: .line 537
            aload 3 /* line */
            ldc "  "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         4: .line 539
      StackMap locals: com.oracle.truffle.api.CallTarget java.lang.StringBuilder
      StackMap stack:
            aload 3 /* line */
            aload 1 /* frameInstance */
            aload 2 /* target */
            invokestatic org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper.formatStackFrame:(Lcom/oracle/truffle/api/frame/FrameInstance;Lcom/oracle/truffle/api/CallTarget;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "\n"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         5: .line 540
            aload 0 /* this */
            dup
            getfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.frameIndex:I
            iconst_1
            iadd
            putfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.frameIndex:I
         6: .line 542
            aload 0 /* this */
            getfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.val$messageBuilder:Ljava/lang/StringBuilder;
            aload 3 /* line */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/CharSequence;)Ljava/lang/StringBuilder;
            pop
         7: .line 543
            aload 0 /* this */
            getfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.frameIndex:I
            aload 0 /* this */
            getfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.val$limit:I
            if_icmpge 9
         8: .line 544
            aconst_null
            areturn
         9: .line 546
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1.val$messageBuilder:Ljava/lang/StringBuilder;
            ldc "    ...\n"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        10: .line 547
            aload 1 /* frameInstance */
            areturn
        end local 3 // java.lang.StringBuilder line
        end local 2 // com.oracle.truffle.api.CallTarget target
        end local 1 // com.oracle.truffle.api.frame.FrameInstance frameInstance
        end local 0 // org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1 this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   11     0           this  Lorg/graalvm/compiler/truffle/runtime/hotspot/AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1;
            0   11     1  frameInstance  Lcom/oracle/truffle/api/frame/FrameInstance;
            1   11     2         target  Lcom/oracle/truffle/api/CallTarget;
            2   11     3           line  Ljava/lang/StringBuilder;
    MethodParameters:
               Name  Flags
      frameInstance  
}
Signature: Ljava/lang/Object;Lcom/oracle/truffle/api/frame/FrameInstanceVisitor<Ljava/lang/Object;>;
SourceFile: "AbstractHotSpotTruffleRuntime.java"
EnclosingMethod: org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper.logTransferToInterpreter:(Lorg/graalvm/compiler/truffle/runtime/hotspot/AbstractHotSpotTruffleRuntime;Lorg/graalvm/compiler/truffle/runtime/OptimizedCallTarget;)V
NestHost: org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime
InnerClasses:
  private TraceTransferToInterpreterHelper = org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper of org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime
  org.graalvm.compiler.truffle.runtime.hotspot.AbstractHotSpotTruffleRuntime$TraceTransferToInterpreterHelper$1