https://www.graalvm.org/ 
public abstract class com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode extends com.oracle.truffle.js.nodes.function.JSBuiltinNode
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode
  super_class: com.oracle.truffle.js.nodes.function.JSBuiltinNode
{
  private com.oracle.truffle.js.nodes.cast.JSToObjectNode toObjectNode;
    descriptor: Lcom/oracle/truffle/js/nodes/cast/JSToObjectNode;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  private final com.oracle.truffle.api.profiles.ValueProfile arrayType;
    descriptor: Lcom/oracle/truffle/api/profiles/ValueProfile;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final com.oracle.truffle.api.profiles.ConditionProfile isArray;
    descriptor: Lcom/oracle/truffle/api/profiles/ConditionProfile;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(com.oracle.truffle.js.runtime.JSContext, com.oracle.truffle.js.nodes.function.JSBuiltin);
    descriptor: (Lcom/oracle/truffle/js/runtime/JSContext;Lcom/oracle/truffle/js/nodes/function/JSBuiltin;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode this
        start local 1 // com.oracle.truffle.js.runtime.JSContext context
        start local 2 // com.oracle.truffle.js.nodes.function.JSBuiltin builtin
         0: .line 565
            aload 0 /* this */
            aload 1 /* context */
            aload 2 /* builtin */
            invokespecial com.oracle.truffle.js.nodes.function.JSBuiltinNode.<init>:(Lcom/oracle/truffle/js/runtime/JSContext;Lcom/oracle/truffle/js/nodes/function/JSBuiltin;)V
         1: .line 566
            aload 0 /* this */
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode.getContext:()Lcom/oracle/truffle/js/runtime/JSContext;
            invokestatic com.oracle.truffle.js.nodes.cast.JSToObjectNode.createToObject:(Lcom/oracle/truffle/js/runtime/JSContext;)Lcom/oracle/truffle/js/nodes/cast/JSToObjectNode;
            putfield com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode.toObjectNode:Lcom/oracle/truffle/js/nodes/cast/JSToObjectNode;
         2: .line 567
            aload 0 /* this */
            invokestatic com.oracle.truffle.api.profiles.ValueProfile.createClassProfile:()Lcom/oracle/truffle/api/profiles/ValueProfile;
            putfield com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode.arrayType:Lcom/oracle/truffle/api/profiles/ValueProfile;
         3: .line 568
            aload 0 /* this */
            invokestatic com.oracle.truffle.api.profiles.ConditionProfile.createBinaryProfile:()Lcom/oracle/truffle/api/profiles/ConditionProfile;
            putfield com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode.isArray:Lcom/oracle/truffle/api/profiles/ConditionProfile;
         4: .line 569
            return
        end local 2 // com.oracle.truffle.js.nodes.function.JSBuiltin builtin
        end local 1 // com.oracle.truffle.js.runtime.JSContext context
        end local 0 // com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    5     0     this  Lcom/oracle/truffle/js/builtins/DebugBuiltins$DebugIsHolesArrayNode;
            0    5     1  context  Lcom/oracle/truffle/js/runtime/JSContext;
            0    5     2  builtin  Lcom/oracle/truffle/js/nodes/function/JSBuiltin;
    MethodParameters:
         Name  Flags
      context  
      builtin  

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

  protected boolean isHolesArray(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=4, args_size=2
        start local 0 // com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode this
        start local 1 // java.lang.Object arr
         0: .line 575
            aload 0 /* this */
            getfield com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode.toObjectNode:Lcom/oracle/truffle/js/nodes/cast/JSToObjectNode;
            aload 1 /* arr */
            invokevirtual com.oracle.truffle.js.nodes.cast.JSToObjectNode.execute:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 2 /* obj */
        start local 2 // java.lang.Object obj
         1: .line 576
            aload 0 /* this */
            getfield com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode.isArray:Lcom/oracle/truffle/api/profiles/ConditionProfile;
            aload 2 /* obj */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSArray.isJSArray:(Ljava/lang/Object;)Z
            invokevirtual com.oracle.truffle.api.profiles.ConditionProfile.profile:(Z)Z
            ifeq 4
         2: .line 577
            aload 2 /* obj */
            checkcast com.oracle.truffle.api.object.DynamicObject
            astore 3 /* dynObj */
        start local 3 // com.oracle.truffle.api.object.DynamicObject dynObj
         3: .line 578
            aload 0 /* this */
            getfield com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode.arrayType:Lcom/oracle/truffle/api/profiles/ValueProfile;
            aload 3 /* dynObj */
            invokestatic com.oracle.truffle.js.runtime.objects.JSObject.getArray:(Lcom/oracle/truffle/api/object/DynamicObject;)Lcom/oracle/truffle/js/runtime/array/ScriptArray;
            invokevirtual com.oracle.truffle.api.profiles.ValueProfile.profile:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.oracle.truffle.js.runtime.array.ScriptArray
            aload 3 /* dynObj */
            invokevirtual com.oracle.truffle.js.runtime.array.ScriptArray.hasHoles:(Lcom/oracle/truffle/api/object/DynamicObject;)Z
            ireturn
        end local 3 // com.oracle.truffle.api.object.DynamicObject dynObj
         4: .line 580
      StackMap locals: java.lang.Object
      StackMap stack:
            iconst_0
            ireturn
        end local 2 // java.lang.Object obj
        end local 1 // java.lang.Object arr
        end local 0 // com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    5     0    this  Lcom/oracle/truffle/js/builtins/DebugBuiltins$DebugIsHolesArrayNode;
            0    5     1     arr  Ljava/lang/Object;
            1    5     2     obj  Ljava/lang/Object;
            3    4     3  dynObj  Lcom/oracle/truffle/api/object/DynamicObject;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization()
    MethodParameters:
      Name  Flags
      arr   

  protected com.oracle.truffle.js.nodes.JavaScriptNode copyUninitialized(java.util.Set<java.lang.Class<? extends com.oracle.truffle.api.instrumentation.Tag>>);
    descriptor: (Ljava/util/Set;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode this
         0: .line 586
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tDebugIsHolesArrayNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/builtins/DebugBuiltins$DebugIsHolesArrayNode;
    Signature: (Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
                  Name  Flags
      materializedTags  
}
SourceFile: "DebugBuiltins.java"
NestHost: com.oracle.truffle.js.builtins.DebugBuiltins
InnerClasses:
  public abstract Child = com.oracle.truffle.api.nodes.Node$Child of com.oracle.truffle.api.nodes.Node
  public abstract DebugIsHolesArrayNode = com.oracle.truffle.js.builtins.DebugBuiltins$DebugIsHolesArrayNode of com.oracle.truffle.js.builtins.DebugBuiltins