https://www.graalvm.org/ 
class org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode extends org.graalvm.compiler.nodes.calc.FloatingNode implements org.graalvm.compiler.graph.spi.Canonicalizable, org.graalvm.compiler.nodes.extended.GuardingNode, org.graalvm.compiler.nodes.extended.AnchoringNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode
  super_class: org.graalvm.compiler.nodes.calc.FloatingNode
{
  public static final org.graalvm.compiler.graph.NodeClass<org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode> TYPE;
    descriptor: Lorg/graalvm/compiler/graph/NodeClass;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    Signature: Lorg/graalvm/compiler/graph/NodeClass<Lorg/graalvm/compiler/nodes/SimplifyingGraphDecoder$CanonicalizeToNullNode;>;

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 115
            ldc Lorg/graalvm/compiler/nodes/SimplifyingGraphDecoder$CanonicalizeToNullNode;
            invokestatic org.graalvm.compiler.graph.NodeClass.create:(Ljava/lang/Class;)Lorg/graalvm/compiler/graph/NodeClass;
            putstatic org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode.TYPE:Lorg/graalvm/compiler/graph/NodeClass;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  protected void <init>(org.graalvm.compiler.core.common.type.Stamp);
    descriptor: (Lorg/graalvm/compiler/core/common/type/Stamp;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode this
        start local 1 // org.graalvm.compiler.core.common.type.Stamp stamp
         0: .line 118
            aload 0 /* this */
            getstatic org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode.TYPE:Lorg/graalvm/compiler/graph/NodeClass;
            aload 1 /* stamp */
            invokespecial org.graalvm.compiler.nodes.calc.FloatingNode.<init>:(Lorg/graalvm/compiler/graph/NodeClass;Lorg/graalvm/compiler/core/common/type/Stamp;)V
         1: .line 119
            return
        end local 1 // org.graalvm.compiler.core.common.type.Stamp stamp
        end local 0 // org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lorg/graalvm/compiler/nodes/SimplifyingGraphDecoder$CanonicalizeToNullNode;
            0    2     1  stamp  Lorg/graalvm/compiler/core/common/type/Stamp;
    MethodParameters:
       Name  Flags
      stamp  

  public org.graalvm.compiler.graph.Node canonical(org.graalvm.compiler.graph.spi.CanonicalizerTool);
    descriptor: (Lorg/graalvm/compiler/graph/spi/CanonicalizerTool;)Lorg/graalvm/compiler/graph/Node;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode this
        start local 1 // org.graalvm.compiler.graph.spi.CanonicalizerTool tool
         0: .line 123
            aconst_null
            areturn
        end local 1 // org.graalvm.compiler.graph.spi.CanonicalizerTool tool
        end local 0 // org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/compiler/nodes/SimplifyingGraphDecoder$CanonicalizeToNullNode;
            0    1     1  tool  Lorg/graalvm/compiler/graph/spi/CanonicalizerTool;
    MethodParameters:
      Name  Flags
      tool  
}
SourceFile: "SimplifyingGraphDecoder.java"
NestHost: org.graalvm.compiler.nodes.SimplifyingGraphDecoder
InnerClasses:
  CanonicalizeToNullNode = org.graalvm.compiler.nodes.SimplifyingGraphDecoder$CanonicalizeToNullNode of org.graalvm.compiler.nodes.SimplifyingGraphDecoder
    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;, allowedUsageTypes = {org.graalvm.compiler.nodeinfo.InputType.Guard:Lorg/graalvm/compiler/nodeinfo/InputType;, org.graalvm.compiler.nodeinfo.InputType.Anchor:Lorg/graalvm/compiler/nodeinfo/InputType;})