https://www.graalvm.org/ 
class com.oracle.truffle.tools.profiler.CPUSampler$3 implements java.util.function.Function<com.oracle.truffle.tools.profiler.CPUSampler$Payload, com.oracle.truffle.tools.profiler.CPUSampler$Payload>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.tools.profiler.CPUSampler$3
  super_class: java.lang.Object
{
  final com.oracle.truffle.tools.profiler.CPUSampler this$0;
    descriptor: Lcom/oracle/truffle/tools/profiler/CPUSampler;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.tools.profiler.CPUSampler);
    descriptor: (Lcom/oracle/truffle/tools/profiler/CPUSampler;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.tools.profiler.CPUSampler$3 this
         0: .line 447
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.tools.profiler.CPUSampler$3.this$0:Lcom/oracle/truffle/tools/profiler/CPUSampler;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.tools.profiler.CPUSampler$3 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/tools/profiler/CPUSampler$3;
    MethodParameters:
        Name  Flags
      this$0  final

  public com.oracle.truffle.tools.profiler.CPUSampler$Payload apply(com.oracle.truffle.tools.profiler.CPUSampler$Payload);
    descriptor: (Lcom/oracle/truffle/tools/profiler/CPUSampler$Payload;)Lcom/oracle/truffle/tools/profiler/CPUSampler$Payload;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=5, args_size=2
        start local 0 // com.oracle.truffle.tools.profiler.CPUSampler$3 this
        start local 1 // com.oracle.truffle.tools.profiler.CPUSampler$Payload sourcePayload
         0: .line 450
            new com.oracle.truffle.tools.profiler.CPUSampler$Payload
            dup
            invokespecial com.oracle.truffle.tools.profiler.CPUSampler$Payload.<init>:()V
            astore 2 /* destinationPayload */
        start local 2 // com.oracle.truffle.tools.profiler.CPUSampler$Payload destinationPayload
         1: .line 451
            aload 2 /* destinationPayload */
            aload 1 /* sourcePayload */
            getfield com.oracle.truffle.tools.profiler.CPUSampler$Payload.selfCompiledHitCount:I
            putfield com.oracle.truffle.tools.profiler.CPUSampler$Payload.selfCompiledHitCount:I
         2: .line 452
            aload 2 /* destinationPayload */
            aload 1 /* sourcePayload */
            getfield com.oracle.truffle.tools.profiler.CPUSampler$Payload.selfInterpretedHitCount:I
            putfield com.oracle.truffle.tools.profiler.CPUSampler$Payload.selfInterpretedHitCount:I
         3: .line 453
            aload 2 /* destinationPayload */
            aload 1 /* sourcePayload */
            getfield com.oracle.truffle.tools.profiler.CPUSampler$Payload.compiledHitCount:I
            putfield com.oracle.truffle.tools.profiler.CPUSampler$Payload.compiledHitCount:I
         4: .line 454
            aload 2 /* destinationPayload */
            aload 1 /* sourcePayload */
            getfield com.oracle.truffle.tools.profiler.CPUSampler$Payload.interpretedHitCount:I
            putfield com.oracle.truffle.tools.profiler.CPUSampler$Payload.interpretedHitCount:I
         5: .line 455
            aload 1 /* sourcePayload */
            invokevirtual com.oracle.truffle.tools.profiler.CPUSampler$Payload.getSelfHitTimes:()Ljava/util/List;
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 4
            goto 8
      StackMap locals: com.oracle.truffle.tools.profiler.CPUSampler$3 com.oracle.truffle.tools.profiler.CPUSampler$Payload com.oracle.truffle.tools.profiler.CPUSampler$Payload top java.util.Iterator
      StackMap stack:
         6: aload 4
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.lang.Long
            astore 3 /* timestamp */
        start local 3 // java.lang.Long timestamp
         7: .line 456
            aload 2 /* destinationPayload */
            aload 3 /* timestamp */
            invokevirtual com.oracle.truffle.tools.profiler.CPUSampler$Payload.addSelfHitTime:(Ljava/lang/Long;)V
        end local 3 // java.lang.Long timestamp
         8: .line 455
      StackMap locals:
      StackMap stack:
            aload 4
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 6
         9: .line 458
            aload 2 /* destinationPayload */
            areturn
        end local 2 // com.oracle.truffle.tools.profiler.CPUSampler$Payload destinationPayload
        end local 1 // com.oracle.truffle.tools.profiler.CPUSampler$Payload sourcePayload
        end local 0 // com.oracle.truffle.tools.profiler.CPUSampler$3 this
      LocalVariableTable:
        Start  End  Slot                Name  Signature
            0   10     0                this  Lcom/oracle/truffle/tools/profiler/CPUSampler$3;
            0   10     1       sourcePayload  Lcom/oracle/truffle/tools/profiler/CPUSampler$Payload;
            1   10     2  destinationPayload  Lcom/oracle/truffle/tools/profiler/CPUSampler$Payload;
            7    8     3           timestamp  Ljava/lang/Long;
    MethodParameters:
               Name  Flags
      sourcePayload  

  public java.lang.Object apply(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast com.oracle.truffle.tools.profiler.CPUSampler$Payload
            invokevirtual com.oracle.truffle.tools.profiler.CPUSampler$3.apply:(Lcom/oracle/truffle/tools/profiler/CPUSampler$Payload;)Lcom/oracle/truffle/tools/profiler/CPUSampler$Payload;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/Function<Lcom/oracle/truffle/tools/profiler/CPUSampler$Payload;Lcom/oracle/truffle/tools/profiler/CPUSampler$Payload;>;
SourceFile: "CPUSampler.java"
EnclosingMethod: com.oracle.truffle.tools.profiler.CPUSampler
NestHost: com.oracle.truffle.tools.profiler.CPUSampler
InnerClasses:
  com.oracle.truffle.tools.profiler.CPUSampler$3
  public final Payload = com.oracle.truffle.tools.profiler.CPUSampler$Payload of com.oracle.truffle.tools.profiler.CPUSampler