https://www.graalvm.org/ 
public abstract class com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode extends com.oracle.truffle.js.nodes.access.FrameSlotNode$WithDescriptor implements com.oracle.truffle.js.nodes.access.WriteNode
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode
  super_class: com.oracle.truffle.js.nodes.access.FrameSlotNode$WithDescriptor
{
  protected void <init>(com.oracle.truffle.api.frame.FrameSlot, com.oracle.truffle.api.frame.FrameDescriptor);
    descriptor: (Lcom/oracle/truffle/api/frame/FrameSlot;Lcom/oracle/truffle/api/frame/FrameDescriptor;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
        start local 1 // com.oracle.truffle.api.frame.FrameSlot frameSlot
        start local 2 // com.oracle.truffle.api.frame.FrameDescriptor frameDescriptor
         0: .line 63
            aload 0 /* this */
            aload 1 /* frameSlot */
            aload 2 /* frameDescriptor */
            invokespecial com.oracle.truffle.js.nodes.access.FrameSlotNode$WithDescriptor.<init>:(Lcom/oracle/truffle/api/frame/FrameSlot;Lcom/oracle/truffle/api/frame/FrameDescriptor;)V
         1: .line 64
            return
        end local 2 // com.oracle.truffle.api.frame.FrameDescriptor frameDescriptor
        end local 1 // com.oracle.truffle.api.frame.FrameSlot frameSlot
        end local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    2     0             this  Lcom/oracle/truffle/js/nodes/access/JSWriteFrameSlotNode;
            0    2     1        frameSlot  Lcom/oracle/truffle/api/frame/FrameSlot;
            0    2     2  frameDescriptor  Lcom/oracle/truffle/api/frame/FrameDescriptor;
    MethodParameters:
                 Name  Flags
      frameSlot        
      frameDescriptor  

  public boolean hasTag(java.lang.Class<? extends com.oracle.truffle.api.instrumentation.Tag>);
    descriptor: (Ljava/lang/Class;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
        start local 1 // java.lang.Class tag
         0: .line 68
            aload 1 /* tag */
            ldc Lcom/oracle/truffle/js/nodes/instrumentation/JSTags$WriteVariableTag;
            if_acmpeq 1
            aload 1 /* tag */
            ldc Lcom/oracle/truffle/api/instrumentation/StandardTags$WriteVariableTag;
            if_acmpne 4
         1: .line 69
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.frameSlot:Lcom/oracle/truffle/api/frame/FrameSlot;
            invokestatic com.oracle.truffle.js.runtime.JSFrameUtil.isInternal:(Lcom/oracle/truffle/api/frame/FrameSlot;)Z
            ifeq 2
            iconst_0
            goto 3
      StackMap locals:
      StackMap stack:
         2: iconst_1
      StackMap locals:
      StackMap stack: int
         3: ireturn
         4: .line 70
      StackMap locals:
      StackMap stack:
            aload 1 /* tag */
            ldc Lcom/oracle/truffle/js/nodes/instrumentation/JSTags$InputNodeTag;
            if_acmpne 8
         5: .line 71
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.frameSlot:Lcom/oracle/truffle/api/frame/FrameSlot;
            invokestatic com.oracle.truffle.js.runtime.JSFrameUtil.isInternal:(Lcom/oracle/truffle/api/frame/FrameSlot;)Z
            ifeq 6
            iconst_0
            goto 7
      StackMap locals:
      StackMap stack:
         6: iconst_1
      StackMap locals:
      StackMap stack: int
         7: ireturn
         8: .line 73
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* tag */
            invokespecial com.oracle.truffle.js.nodes.access.FrameSlotNode$WithDescriptor.hasTag:(Ljava/lang/Class;)Z
            ireturn
        end local 1 // java.lang.Class tag
        end local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0  this  Lcom/oracle/truffle/js/nodes/access/JSWriteFrameSlotNode;
            0    9     1   tag  Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;
    Signature: (Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;)Z
    MethodParameters:
      Name  Flags
      tag   

  public java.lang.Object getNodeObject();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
         0: .line 79
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.frameSlot:Lcom/oracle/truffle/api/frame/FrameSlot;
            invokestatic com.oracle.truffle.js.runtime.JSFrameUtil.getPublicName:(Lcom/oracle/truffle/api/frame/FrameSlot;)Ljava/lang/String;
            astore 1 /* name */
        start local 1 // java.lang.String name
         1: .line 80
            ldc "name"
            aload 1 /* name */
            invokestatic com.oracle.truffle.js.nodes.instrumentation.JSTags.createNodeObjectDescriptor:(Ljava/lang/String;Ljava/lang/Object;)Lcom/oracle/truffle/js/nodes/instrumentation/NodeObjectDescriptor;
            astore 2 /* descriptor */
        start local 2 // com.oracle.truffle.js.nodes.instrumentation.NodeObjectDescriptor descriptor
         2: .line 81
            aload 2 /* descriptor */
            ldc "writeVariableName"
            aload 1 /* name */
            invokevirtual com.oracle.truffle.js.nodes.instrumentation.NodeObjectDescriptor.addProperty:(Ljava/lang/String;Ljava/lang/Object;)V
         3: .line 82
            aload 2 /* descriptor */
            areturn
        end local 2 // com.oracle.truffle.js.nodes.instrumentation.NodeObjectDescriptor descriptor
        end local 1 // java.lang.String name
        end local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    4     0        this  Lcom/oracle/truffle/js/nodes/access/JSWriteFrameSlotNode;
            1    4     1        name  Ljava/lang/String;
            2    4     2  descriptor  Lcom/oracle/truffle/js/nodes/instrumentation/NodeObjectDescriptor;

  public com.oracle.truffle.api.instrumentation.InstrumentableNode materializeInstrumentableNodes(java.util.Set<java.lang.Class<? extends com.oracle.truffle.api.instrumentation.Tag>>);
    descriptor: (Ljava/util/Set;)Lcom/oracle/truffle/api/instrumentation/InstrumentableNode;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
        start local 1 // java.util.Set materializedTags
         0: .line 87
            aload 1 /* materializedTags */
            ldc Lcom/oracle/truffle/js/nodes/instrumentation/JSTags$WriteVariableTag;
            invokeinterface java.util.Set.contains:(Ljava/lang/Object;)Z
            ifne 1
            aload 1 /* materializedTags */
            ldc Lcom/oracle/truffle/api/instrumentation/StandardTags$WriteVariableTag;
            invokeinterface java.util.Set.contains:(Ljava/lang/Object;)Z
            ifeq 3
         1: .line 88
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.getRhs:()Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            ifnull 3
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.getRhs:()Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokevirtual com.oracle.truffle.js.nodes.JavaScriptNode.hasSourceSection:()Z
            ifne 3
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.hasSourceSection:()Z
            ifeq 3
         2: .line 89
            aload 0 /* this */
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.getRhs:()Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokestatic com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.transferSourceSectionAddExpressionTag:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
         3: .line 92
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            areturn
        end local 1 // java.util.Set materializedTags
        end local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    4     0              this  Lcom/oracle/truffle/js/nodes/access/JSWriteFrameSlotNode;
            0    4     1  materializedTags  Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;
    Signature: (Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;)Lcom/oracle/truffle/api/instrumentation/InstrumentableNode;
    MethodParameters:
                  Name  Flags
      materializedTags  

  public abstract com.oracle.truffle.js.nodes.JavaScriptNode getRhs();
    descriptor: ()Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.lang.Object executeWithFrame(com.oracle.truffle.api.frame.Frame, java.lang.Object);
    descriptor: (Lcom/oracle/truffle/api/frame/Frame;Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      frame  
      value  

  public static com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode create(com.oracle.truffle.api.frame.FrameSlot, int, int, com.oracle.truffle.api.frame.FrameDescriptor, com.oracle.truffle.api.frame.FrameSlot[], com.oracle.truffle.js.nodes.JavaScriptNode, boolean);
    descriptor: (Lcom/oracle/truffle/api/frame/FrameSlot;IILcom/oracle/truffle/api/frame/FrameDescriptor;[Lcom/oracle/truffle/api/frame/FrameSlot;Lcom/oracle/truffle/js/nodes/JavaScriptNode;Z)Lcom/oracle/truffle/js/nodes/access/JSWriteFrameSlotNode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=7, args_size=7
         0: .line 103
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tJSWriteCurrentFrameSlotNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    MethodParameters:
                     Name  Flags
      frameSlot            
      frameLevel           
      scopeLevel           
      frameDescriptor      
      parentSlots          
      rhs                  
      hasTemporalDeadZone  

  public static com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode create(com.oracle.truffle.api.frame.FrameSlot, com.oracle.truffle.js.nodes.access.ScopeFrameNode, com.oracle.truffle.js.nodes.JavaScriptNode, com.oracle.truffle.api.frame.FrameDescriptor, boolean);
    descriptor: (Lcom/oracle/truffle/api/frame/FrameSlot;Lcom/oracle/truffle/js/nodes/access/ScopeFrameNode;Lcom/oracle/truffle/js/nodes/JavaScriptNode;Lcom/oracle/truffle/api/frame/FrameDescriptor;Z)Lcom/oracle/truffle/js/nodes/access/JSWriteFrameSlotNode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=5, args_size=5
         0: .line 109
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tJSWriteScopeFrameSlotNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    MethodParameters:
                     Name  Flags
      frameSlot            
      levelFrameNode       
      rhs                  
      frameDescriptor      
      hasTemporalDeadZone  

  public final boolean isResultAlwaysOfType(java.lang.Class<?>);
    descriptor: (Ljava/lang/Class;)Z
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
        start local 1 // java.lang.Class clazz
         0: .line 114
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode.getRhs:()Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 1 /* clazz */
            invokevirtual com.oracle.truffle.js.nodes.JavaScriptNode.isResultAlwaysOfType:(Ljava/lang/Class;)Z
            ireturn
        end local 1 // java.lang.Class clazz
        end local 0 // com.oracle.truffle.js.nodes.access.JSWriteFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/js/nodes/access/JSWriteFrameSlotNode;
            0    1     1  clazz  Ljava/lang/Class<*>;
    Signature: (Ljava/lang/Class<*>;)Z
    MethodParameters:
       Name  Flags
      clazz  
}
SourceFile: "JSWriteFrameSlotNode.java"
InnerClasses:
  public final WriteVariableTag = com.oracle.truffle.api.instrumentation.StandardTags$WriteVariableTag of com.oracle.truffle.api.instrumentation.StandardTags
  public abstract WithDescriptor = com.oracle.truffle.js.nodes.access.FrameSlotNode$WithDescriptor of com.oracle.truffle.js.nodes.access.FrameSlotNode
  public final InputNodeTag = com.oracle.truffle.js.nodes.instrumentation.JSTags$InputNodeTag of com.oracle.truffle.js.nodes.instrumentation.JSTags
  public final WriteVariableTag = com.oracle.truffle.js.nodes.instrumentation.JSTags$WriteVariableTag of com.oracle.truffle.js.nodes.instrumentation.JSTags