https://www.graalvm.org/ 
public final class org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode extends org.graalvm.compiler.nodes.FixedWithNextNode implements org.graalvm.compiler.nodes.spi.Virtualizable, org.graalvm.compiler.nodes.spi.Lowerable
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode
  super_class: org.graalvm.compiler.nodes.FixedWithNextNode
{
  public static final org.graalvm.compiler.graph.NodeClass<org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode> 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/virtual/EnsureVirtualizedNode;>;

  org.graalvm.compiler.nodes.ValueNode object;
    descriptor: Lorg/graalvm/compiler/nodes/ValueNode;
    flags: (0x0000) 
    RuntimeVisibleAnnotations: 
      org.graalvm.compiler.graph.Node$Input()

  private final boolean localOnly;
    descriptor: Z
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 53
            ldc Lorg/graalvm/compiler/nodes/virtual/EnsureVirtualizedNode;
            invokestatic org.graalvm.compiler.graph.NodeClass.create:(Ljava/lang/Class;)Lorg/graalvm/compiler/graph/NodeClass;
            putstatic org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode.TYPE:Lorg/graalvm/compiler/graph/NodeClass;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>(org.graalvm.compiler.nodes.ValueNode, boolean);
    descriptor: (Lorg/graalvm/compiler/nodes/ValueNode;Z)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode this
        start local 1 // org.graalvm.compiler.nodes.ValueNode object
        start local 2 // boolean localOnly
         0: .line 59
            aload 0 /* this */
            getstatic org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode.TYPE:Lorg/graalvm/compiler/graph/NodeClass;
            invokestatic org.graalvm.compiler.core.common.type.StampFactory.forVoid:()Lorg/graalvm/compiler/core/common/type/Stamp;
            invokespecial org.graalvm.compiler.nodes.FixedWithNextNode.<init>:(Lorg/graalvm/compiler/graph/NodeClass;Lorg/graalvm/compiler/core/common/type/Stamp;)V
         1: .line 60
            aload 0 /* this */
            aload 1 /* object */
            putfield org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode.object:Lorg/graalvm/compiler/nodes/ValueNode;
         2: .line 61
            aload 0 /* this */
            iload 2 /* localOnly */
            putfield org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode.localOnly:Z
         3: .line 62
            return
        end local 2 // boolean localOnly
        end local 1 // org.graalvm.compiler.nodes.ValueNode object
        end local 0 // org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    4     0       this  Lorg/graalvm/compiler/nodes/virtual/EnsureVirtualizedNode;
            0    4     1     object  Lorg/graalvm/compiler/nodes/ValueNode;
            0    4     2  localOnly  Z
    MethodParameters:
           Name  Flags
      object     
      localOnly  

  public void virtualize(org.graalvm.compiler.nodes.spi.VirtualizerTool);
    descriptor: (Lorg/graalvm/compiler/nodes/spi/VirtualizerTool;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=5, args_size=2
        start local 0 // org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode this
        start local 1 // org.graalvm.compiler.nodes.spi.VirtualizerTool tool
         0: .line 66
            aload 1 /* tool */
            aload 0 /* this */
            getfield org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode.object:Lorg/graalvm/compiler/nodes/ValueNode;
            invokeinterface org.graalvm.compiler.nodes.spi.VirtualizerTool.getAlias:(Lorg/graalvm/compiler/nodes/ValueNode;)Lorg/graalvm/compiler/nodes/ValueNode;
            astore 2 /* alias */
        start local 2 // org.graalvm.compiler.nodes.ValueNode alias
         1: .line 67
            aload 2 /* alias */
            instanceof org.graalvm.compiler.nodes.virtual.VirtualObjectNode
            ifeq 9
         2: .line 68
            aload 2 /* alias */
            checkcast org.graalvm.compiler.nodes.virtual.VirtualObjectNode
            astore 3 /* virtual */
        start local 3 // org.graalvm.compiler.nodes.virtual.VirtualObjectNode virtual
         3: .line 69
            aload 3 /* virtual */
            instanceof org.graalvm.compiler.nodes.virtual.VirtualBoxingNode
            ifeq 6
         4: .line 70
            new org.graalvm.compiler.graph.VerificationError
            dup
            ldc "ensureVirtual is not valid for boxing objects: %s"
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            aload 3 /* virtual */
            invokevirtual org.graalvm.compiler.nodes.virtual.VirtualObjectNode.type:()Ljdk/vm/ci/meta/ResolvedJavaType;
            invokeinterface jdk.vm.ci.meta.ResolvedJavaType.getName:()Ljava/lang/String;
            aastore
            invokespecial org.graalvm.compiler.graph.VerificationError.<init>:(Ljava/lang/String;[Ljava/lang/Object;)V
            astore 4 /* exception */
        start local 4 // java.lang.Throwable exception
         5: .line 71
            aload 0 /* this */
            aload 4 /* exception */
            invokestatic org.graalvm.compiler.nodes.util.GraphUtil.approxSourceException:(Lorg/graalvm/compiler/graph/Node;Ljava/lang/Throwable;)Ljava/lang/RuntimeException;
            athrow
        end local 4 // java.lang.Throwable exception
         6: .line 73
      StackMap locals: org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.virtual.VirtualObjectNode
      StackMap stack:
            aload 0 /* this */
            getfield org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode.localOnly:Z
            ifne 8
         7: .line 74
            aload 1 /* tool */
            aload 3 /* virtual */
            iconst_1
            invokeinterface org.graalvm.compiler.nodes.spi.VirtualizerTool.setEnsureVirtualized:(Lorg/graalvm/compiler/nodes/virtual/VirtualObjectNode;Z)V
         8: .line 76
      StackMap locals:
      StackMap stack:
            aload 1 /* tool */
            invokeinterface org.graalvm.compiler.nodes.spi.VirtualizerTool.delete:()V
        end local 3 // org.graalvm.compiler.nodes.virtual.VirtualObjectNode virtual
         9: .line 78
      StackMap locals:
      StackMap stack:
            return
        end local 2 // org.graalvm.compiler.nodes.ValueNode alias
        end local 1 // org.graalvm.compiler.nodes.spi.VirtualizerTool tool
        end local 0 // org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   10     0       this  Lorg/graalvm/compiler/nodes/virtual/EnsureVirtualizedNode;
            0   10     1       tool  Lorg/graalvm/compiler/nodes/spi/VirtualizerTool;
            1   10     2      alias  Lorg/graalvm/compiler/nodes/ValueNode;
            3    9     3    virtual  Lorg/graalvm/compiler/nodes/virtual/VirtualObjectNode;
            5    6     4  exception  Ljava/lang/Throwable;
    MethodParameters:
      Name  Flags
      tool  

  public void lower(org.graalvm.compiler.nodes.spi.LoweringTool);
    descriptor: (Lorg/graalvm/compiler/nodes/spi/LoweringTool;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode this
        start local 1 // org.graalvm.compiler.nodes.spi.LoweringTool tool
         0: .line 82
            aload 0 /* this */
            aload 0 /* this */
            getfield org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode.object:Lorg/graalvm/compiler/nodes/ValueNode;
            getstatic org.graalvm.compiler.nodes.NodeView.DEFAULT:Lorg/graalvm/compiler/nodes/NodeView;
            invokevirtual org.graalvm.compiler.nodes.ValueNode.stamp:(Lorg/graalvm/compiler/nodes/NodeView;)Lorg/graalvm/compiler/core/common/type/Stamp;
            invokestatic org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode.ensureVirtualFailure:(Lorg/graalvm/compiler/graph/Node;Lorg/graalvm/compiler/core/common/type/Stamp;)V
         1: .line 83
            return
        end local 1 // org.graalvm.compiler.nodes.spi.LoweringTool tool
        end local 0 // org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/graalvm/compiler/nodes/virtual/EnsureVirtualizedNode;
            0    2     1  tool  Lorg/graalvm/compiler/nodes/spi/LoweringTool;
    MethodParameters:
      Name  Flags
      tool  

  public static void ensureVirtualFailure(org.graalvm.compiler.graph.Node, org.graalvm.compiler.core.common.type.Stamp);
    descriptor: (Lorg/graalvm/compiler/graph/Node;Lorg/graalvm/compiler/core/common/type/Stamp;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=7, locals=5, args_size=2
        start local 0 // org.graalvm.compiler.graph.Node location
        start local 1 // org.graalvm.compiler.core.common.type.Stamp stamp
         0: .line 86
            ldc ""
            astore 2 /* additionalReason */
        start local 2 // java.lang.String additionalReason
         1: .line 87
            aload 0 /* location */
            instanceof org.graalvm.compiler.nodes.FixedWithNextNode
            ifeq 11
            aload 0 /* location */
            instanceof org.graalvm.compiler.nodes.virtual.EnsureVirtualizedNode
            ifne 11
         2: .line 88
            aload 0 /* location */
            checkcast org.graalvm.compiler.nodes.FixedWithNextNode
            astore 3 /* fixedWithNextNode */
        start local 3 // org.graalvm.compiler.nodes.FixedWithNextNode fixedWithNextNode
         3: .line 89
            aload 3 /* fixedWithNextNode */
            invokevirtual org.graalvm.compiler.nodes.FixedWithNextNode.next:()Lorg/graalvm/compiler/nodes/FixedNode;
            astore 4 /* next */
        start local 4 // org.graalvm.compiler.nodes.FixedNode next
         4: .line 90
            aload 4 /* next */
            instanceof org.graalvm.compiler.nodes.java.StoreFieldNode
            ifeq 7
         5: .line 91
            ldc " (must not store virtual object into a field)"
            astore 2 /* additionalReason */
         6: .line 92
            goto 11
      StackMap locals: java.lang.String org.graalvm.compiler.nodes.FixedWithNextNode org.graalvm.compiler.nodes.FixedNode
      StackMap stack:
         7: aload 4 /* next */
            instanceof org.graalvm.compiler.nodes.Invoke
            ifeq 10
         8: .line 93
            ldc " (must not pass virtual object into an invoke that cannot be inlined)"
            astore 2 /* additionalReason */
         9: .line 94
            goto 11
        10: .line 95
      StackMap locals:
      StackMap stack:
            new java.lang.StringBuilder
            dup
            ldc " (must not let virtual object escape at node "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 4 /* next */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            ldc ")"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            astore 2 /* additionalReason */
        end local 4 // org.graalvm.compiler.nodes.FixedNode next
        end local 3 // org.graalvm.compiler.nodes.FixedWithNextNode fixedWithNextNode
        11: .line 98
      StackMap locals:
      StackMap stack:
            new org.graalvm.compiler.graph.VerificationError
            dup
            ldc "Object of type %s should not be materialized%s:"
            iconst_2
            anewarray java.lang.Object
            dup
            iconst_0
            aload 1 /* stamp */
            invokestatic org.graalvm.compiler.nodes.type.StampTool.typeOrNull:(Lorg/graalvm/compiler/core/common/type/Stamp;)Ljdk/vm/ci/meta/ResolvedJavaType;
            invokeinterface jdk.vm.ci.meta.ResolvedJavaType.getName:()Ljava/lang/String;
            aastore
            dup
            iconst_1
            aload 2 /* additionalReason */
            aastore
            invokespecial org.graalvm.compiler.graph.VerificationError.<init>:(Ljava/lang/String;[Ljava/lang/Object;)V
            astore 3 /* exception */
        start local 3 // java.lang.Throwable exception
        12: .line 101
            aload 0 /* location */
            instanceof org.graalvm.compiler.nodes.FixedWithNextNode
            ifeq 15
        13: .line 102
            aload 0 /* location */
            checkcast org.graalvm.compiler.nodes.FixedWithNextNode
            invokevirtual org.graalvm.compiler.nodes.FixedWithNextNode.next:()Lorg/graalvm/compiler/nodes/FixedNode;
            astore 4 /* pos */
        start local 4 // org.graalvm.compiler.graph.Node pos
        14: .line 103
            goto 19
        end local 4 // org.graalvm.compiler.graph.Node pos
      StackMap locals: java.lang.Throwable
      StackMap stack:
        15: aload 0 /* location */
            instanceof org.graalvm.compiler.nodes.AbstractEndNode
            ifeq 18
        16: .line 104
            aload 0 /* location */
            checkcast org.graalvm.compiler.nodes.AbstractEndNode
            invokevirtual org.graalvm.compiler.nodes.AbstractEndNode.merge:()Lorg/graalvm/compiler/nodes/AbstractMergeNode;
            astore 4 /* pos */
        start local 4 // org.graalvm.compiler.graph.Node pos
        17: .line 105
            goto 19
        end local 4 // org.graalvm.compiler.graph.Node pos
        18: .line 106
      StackMap locals:
      StackMap stack:
            aload 0 /* location */
            astore 4 /* pos */
        start local 4 // org.graalvm.compiler.graph.Node pos
        19: .line 108
      StackMap locals: org.graalvm.compiler.graph.Node
      StackMap stack:
            aload 4 /* pos */
            aload 3 /* exception */
            invokestatic org.graalvm.compiler.nodes.util.GraphUtil.approxSourceException:(Lorg/graalvm/compiler/graph/Node;Ljava/lang/Throwable;)Ljava/lang/RuntimeException;
            athrow
        end local 4 // org.graalvm.compiler.graph.Node pos
        end local 3 // java.lang.Throwable exception
        end local 2 // java.lang.String additionalReason
        end local 1 // org.graalvm.compiler.core.common.type.Stamp stamp
        end local 0 // org.graalvm.compiler.graph.Node location
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0   20     0           location  Lorg/graalvm/compiler/graph/Node;
            0   20     1              stamp  Lorg/graalvm/compiler/core/common/type/Stamp;
            1   20     2   additionalReason  Ljava/lang/String;
            3   11     3  fixedWithNextNode  Lorg/graalvm/compiler/nodes/FixedWithNextNode;
            4   11     4               next  Lorg/graalvm/compiler/nodes/FixedNode;
           12   20     3          exception  Ljava/lang/Throwable;
           14   15     4                pos  Lorg/graalvm/compiler/graph/Node;
           17   18     4                pos  Lorg/graalvm/compiler/graph/Node;
           19   20     4                pos  Lorg/graalvm/compiler/graph/Node;
    MethodParameters:
          Name  Flags
      location  
      stamp     
}
SourceFile: "EnsureVirtualizedNode.java"
InnerClasses:
  public abstract Input = org.graalvm.compiler.graph.Node$Input of org.graalvm.compiler.graph.Node
    RuntimeVisibleAnnotations: 
      org.graalvm.compiler.nodeinfo.NodeInfo(cycles = org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0:Lorg/graalvm/compiler/nodeinfo/NodeCycles;, size = org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0:Lorg/graalvm/compiler/nodeinfo/NodeSize;)