https://www.graalvm.org/ 
class com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Block extends com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Expression
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Block
  super_class: com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Expression
{
  final com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Expression[] children;
    descriptor: [Lcom/oracle/truffle/api/benchmark/NodeAdoptionBenchmark$Expression;
    flags: (0x0010) ACC_FINAL
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Children()

  void <init>(com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Expression[]);
    descriptor: ([Lcom/oracle/truffle/api/benchmark/NodeAdoptionBenchmark$Expression;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Block this
        start local 1 // com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Expression[] children
         0: .line 133
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Expression.<init>:()V
         1: .line 134
            aload 0 /* this */
            aload 1 /* children */
            putfield com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Block.children:[Lcom/oracle/truffle/api/benchmark/NodeAdoptionBenchmark$Expression;
         2: .line 135
            return
        end local 1 // com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Expression[] children
        end local 0 // com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Block this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lcom/oracle/truffle/api/benchmark/NodeAdoptionBenchmark$Block;
            0    3     1  children  [Lcom/oracle/truffle/api/benchmark/NodeAdoptionBenchmark$Expression;
    MethodParameters:
          Name  Flags
      children  
}
SourceFile: "NodeAdoptionBenchmark.java"
NestHost: com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark
InnerClasses:
  private Block = com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Block of com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark
  private Expression = com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark$Expression of com.oracle.truffle.api.benchmark.NodeAdoptionBenchmark
  public abstract Children = com.oracle.truffle.api.nodes.Node$Children of com.oracle.truffle.api.nodes.Node