https://www.graalvm.org/ 
public abstract class com.oracle.truffle.js.nodes.access.IsRegExpNode extends com.oracle.truffle.js.nodes.JavaScriptBaseNode
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.nodes.access.IsRegExpNode
  super_class: com.oracle.truffle.js.nodes.JavaScriptBaseNode
{
  private com.oracle.truffle.js.nodes.access.PropertyGetNode getSymbolMatchNode;
    descriptor: Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  void <init>(com.oracle.truffle.js.runtime.JSContext);
    descriptor: (Lcom/oracle/truffle/js/runtime/JSContext;)V
    flags: (0x0000) 
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.IsRegExpNode this
        start local 1 // com.oracle.truffle.js.runtime.JSContext context
         0: .line 62
            aload 0 /* this */
            invokespecial com.oracle.truffle.js.nodes.JavaScriptBaseNode.<init>:()V
         1: .line 63
            aload 0 /* this */
            aload 0 /* this */
            getstatic com.oracle.truffle.js.runtime.Symbol.SYMBOL_MATCH:Lcom/oracle/truffle/js/runtime/Symbol;
            iconst_0
            aload 1 /* context */
            invokestatic com.oracle.truffle.js.nodes.access.PropertyGetNode.create:(Ljava/lang/Object;ZLcom/oracle/truffle/js/runtime/JSContext;)Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
            invokevirtual com.oracle.truffle.js.nodes.access.IsRegExpNode.insert:(Lcom/oracle/truffle/api/nodes/Node;)Lcom/oracle/truffle/api/nodes/Node;
            checkcast com.oracle.truffle.js.nodes.access.PropertyGetNode
            putfield com.oracle.truffle.js.nodes.access.IsRegExpNode.getSymbolMatchNode:Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
         2: .line 64
            return
        end local 1 // com.oracle.truffle.js.runtime.JSContext context
        end local 0 // com.oracle.truffle.js.nodes.access.IsRegExpNode this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    3     0     this  Lcom/oracle/truffle/js/nodes/access/IsRegExpNode;
            0    3     1  context  Lcom/oracle/truffle/js/runtime/JSContext;
    MethodParameters:
         Name  Flags
      context  

  public abstract boolean executeBoolean(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      obj   

  boolean doIsObject(com.oracle.truffle.api.object.DynamicObject, com.oracle.truffle.js.nodes.access.IsJSObjectNode, com.oracle.truffle.js.nodes.cast.JSToBooleanNode, com.oracle.truffle.js.nodes.access.IsJSClassNode, com.oracle.truffle.api.profiles.ConditionProfile);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;Lcom/oracle/truffle/js/nodes/access/IsJSObjectNode;Lcom/oracle/truffle/js/nodes/cast/JSToBooleanNode;Lcom/oracle/truffle/js/nodes/access/IsJSClassNode;Lcom/oracle/truffle/api/profiles/ConditionProfile;)Z
    flags: (0x0000) 
    Code:
      stack=3, locals=7, args_size=6
        start local 0 // com.oracle.truffle.js.nodes.access.IsRegExpNode this
        start local 1 // com.oracle.truffle.api.object.DynamicObject obj
        start local 2 // com.oracle.truffle.js.nodes.access.IsJSObjectNode isObjectNode
        start local 3 // com.oracle.truffle.js.nodes.cast.JSToBooleanNode toBooleanNode
        start local 4 // com.oracle.truffle.js.nodes.access.IsJSClassNode isJSRegExpNode
        start local 5 // com.oracle.truffle.api.profiles.ConditionProfile hasMatchSymbol
         0: .line 74
            aload 2 /* isObjectNode */
            aload 1 /* obj */
            invokevirtual com.oracle.truffle.js.nodes.access.IsJSObjectNode.executeBoolean:(Ljava/lang/Object;)Z
            ifne 2
         1: .line 75
            iconst_0
            ireturn
         2: .line 77
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.IsRegExpNode.getSymbolMatchNode:Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
            aload 1 /* obj */
            invokevirtual com.oracle.truffle.js.nodes.access.PropertyGetNode.getValue:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 6 /* isRegExp */
        start local 6 // java.lang.Object isRegExp
         3: .line 78
            aload 5 /* hasMatchSymbol */
            aload 6 /* isRegExp */
            getstatic com.oracle.truffle.js.runtime.objects.Undefined.instance:Lcom/oracle/truffle/js/runtime/objects/JSDynamicObject;
            if_acmpeq 4
            iconst_1
            goto 5
      StackMap locals: com.oracle.truffle.js.nodes.access.IsRegExpNode com.oracle.truffle.api.object.DynamicObject com.oracle.truffle.js.nodes.access.IsJSObjectNode com.oracle.truffle.js.nodes.cast.JSToBooleanNode com.oracle.truffle.js.nodes.access.IsJSClassNode com.oracle.truffle.api.profiles.ConditionProfile java.lang.Object
      StackMap stack: com.oracle.truffle.api.profiles.ConditionProfile
         4: iconst_0
      StackMap locals: com.oracle.truffle.js.nodes.access.IsRegExpNode com.oracle.truffle.api.object.DynamicObject com.oracle.truffle.js.nodes.access.IsJSObjectNode com.oracle.truffle.js.nodes.cast.JSToBooleanNode com.oracle.truffle.js.nodes.access.IsJSClassNode com.oracle.truffle.api.profiles.ConditionProfile java.lang.Object
      StackMap stack: com.oracle.truffle.api.profiles.ConditionProfile int
         5: invokevirtual com.oracle.truffle.api.profiles.ConditionProfile.profile:(Z)Z
            ifeq 7
         6: .line 79
            aload 3 /* toBooleanNode */
            aload 6 /* isRegExp */
            invokevirtual com.oracle.truffle.js.nodes.cast.JSToBooleanNode.executeBoolean:(Ljava/lang/Object;)Z
            ireturn
         7: .line 81
      StackMap locals:
      StackMap stack:
            aload 4 /* isJSRegExpNode */
            aload 1 /* obj */
            invokevirtual com.oracle.truffle.js.nodes.access.IsJSClassNode.executeBoolean:(Ljava/lang/Object;)Z
            ireturn
        end local 6 // java.lang.Object isRegExp
        end local 5 // com.oracle.truffle.api.profiles.ConditionProfile hasMatchSymbol
        end local 4 // com.oracle.truffle.js.nodes.access.IsJSClassNode isJSRegExpNode
        end local 3 // com.oracle.truffle.js.nodes.cast.JSToBooleanNode toBooleanNode
        end local 2 // com.oracle.truffle.js.nodes.access.IsJSObjectNode isObjectNode
        end local 1 // com.oracle.truffle.api.object.DynamicObject obj
        end local 0 // com.oracle.truffle.js.nodes.access.IsRegExpNode this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    8     0            this  Lcom/oracle/truffle/js/nodes/access/IsRegExpNode;
            0    8     1             obj  Lcom/oracle/truffle/api/object/DynamicObject;
            0    8     2    isObjectNode  Lcom/oracle/truffle/js/nodes/access/IsJSObjectNode;
            0    8     3   toBooleanNode  Lcom/oracle/truffle/js/nodes/cast/JSToBooleanNode;
            0    8     4  isJSRegExpNode  Lcom/oracle/truffle/js/nodes/access/IsJSClassNode;
            0    8     5  hasMatchSymbol  Lcom/oracle/truffle/api/profiles/ConditionProfile;
            3    8     6        isRegExp  Ljava/lang/Object;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization()
    RuntimeInvisibleParameterAnnotations: 
      0:
      1:
        com.oracle.truffle.api.dsl.Cached(value = "create()")
      2:
        com.oracle.truffle.api.dsl.Cached(value = "create()")
      3:
        com.oracle.truffle.api.dsl.Cached(value = "createIsJSRegExpNode()")
      4:
        com.oracle.truffle.api.dsl.Cached(value = "createBinaryProfile()")
    MethodParameters:
                Name  Flags
      obj             
      isObjectNode    
      toBooleanNode   
      isJSRegExpNode  
      hasMatchSymbol  

  boolean doNonObject(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0000) 
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.IsRegExpNode this
        start local 1 // java.lang.Object obj
         0: .line 87
            iconst_0
            ireturn
        end local 1 // java.lang.Object obj
        end local 0 // com.oracle.truffle.js.nodes.access.IsRegExpNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/nodes/access/IsRegExpNode;
            0    1     1   obj  Ljava/lang/Object;
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.dsl.Fallback()
    MethodParameters:
      Name  Flags
      obj   

  static com.oracle.truffle.js.nodes.access.IsJSClassNode createIsJSRegExpNode();
    descriptor: ()Lcom/oracle/truffle/js/nodes/access/IsJSClassNode;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 91
            getstatic com.oracle.truffle.js.runtime.builtins.JSRegExp.INSTANCE:Lcom/oracle/truffle/js/runtime/builtins/JSRegExp;
            invokestatic com.oracle.truffle.js.nodes.access.IsJSClassNode.create:(Lcom/oracle/truffle/js/runtime/builtins/JSClass;)Lcom/oracle/truffle/js/nodes/access/IsJSClassNode;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static com.oracle.truffle.js.nodes.access.IsRegExpNode create(com.oracle.truffle.js.runtime.JSContext);
    descriptor: (Lcom/oracle/truffle/js/runtime/JSContext;)Lcom/oracle/truffle/js/nodes/access/IsRegExpNode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
         0: .line 95
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tIsRegExpNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    MethodParameters:
         Name  Flags
      context  
}
SourceFile: "IsRegExpNode.java"
InnerClasses:
  public abstract Child = com.oracle.truffle.api.nodes.Node$Child of com.oracle.truffle.api.nodes.Node