https://www.graalvm.org/ 
final class org.graalvm.compiler.nodes.FrameState$TwoSlotMarker extends org.graalvm.compiler.nodes.ValueNode
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: org.graalvm.compiler.nodes.FrameState$TwoSlotMarker
  super_class: org.graalvm.compiler.nodes.ValueNode
{
  public static final org.graalvm.compiler.graph.NodeClass<org.graalvm.compiler.nodes.FrameState$TwoSlotMarker> TYPE;
    descriptor: Lorg/graalvm/compiler/graph/NodeClass;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    Signature: Lorg/graalvm/compiler/graph/NodeClass<Lorg/graalvm/compiler/nodes/FrameState$TwoSlotMarker;>;

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 86
            ldc Lorg/graalvm/compiler/nodes/FrameState$TwoSlotMarker;
            invokestatic org.graalvm.compiler.graph.NodeClass.create:(Ljava/lang/Class;)Lorg/graalvm/compiler/graph/NodeClass;
            putstatic org.graalvm.compiler.nodes.FrameState$TwoSlotMarker.TYPE:Lorg/graalvm/compiler/graph/NodeClass;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  protected void <init>();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.graalvm.compiler.nodes.FrameState$TwoSlotMarker this
         0: .line 89
            aload 0 /* this */
            getstatic org.graalvm.compiler.nodes.FrameState$TwoSlotMarker.TYPE:Lorg/graalvm/compiler/graph/NodeClass;
            getstatic jdk.vm.ci.meta.JavaKind.Illegal:Ljdk/vm/ci/meta/JavaKind;
            invokestatic org.graalvm.compiler.core.common.type.StampFactory.forKind:(Ljdk/vm/ci/meta/JavaKind;)Lorg/graalvm/compiler/core/common/type/Stamp;
            invokespecial org.graalvm.compiler.nodes.ValueNode.<init>:(Lorg/graalvm/compiler/graph/NodeClass;Lorg/graalvm/compiler/core/common/type/Stamp;)V
         1: .line 90
            return
        end local 0 // org.graalvm.compiler.nodes.FrameState$TwoSlotMarker this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/graalvm/compiler/nodes/FrameState$TwoSlotMarker;
}
SourceFile: "FrameState.java"
NestHost: org.graalvm.compiler.nodes.FrameState
InnerClasses:
  private final TwoSlotMarker = org.graalvm.compiler.nodes.FrameState$TwoSlotMarker of org.graalvm.compiler.nodes.FrameState
    RuntimeVisibleAnnotations: 
      org.graalvm.compiler.nodeinfo.NodeInfo(cycles = org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_IGNORED:Lorg/graalvm/compiler/nodeinfo/NodeCycles;, size = org.graalvm.compiler.nodeinfo.NodeSize.SIZE_IGNORED:Lorg/graalvm/compiler/nodeinfo/NodeSize;)