https://www.graalvm.org/ 
class com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1 extends com.oracle.truffle.js.runtime.JavaScriptRootNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1
  super_class: com.oracle.truffle.js.runtime.JavaScriptRootNode
{
  private final com.oracle.truffle.api.profiles.ConditionProfile isArrayBuffer;
    descriptor: Lcom/oracle/truffle/api/profiles/ConditionProfile;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

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

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

  private final com.oracle.truffle.js.runtime.JSContext val$context;
    descriptor: Lcom/oracle/truffle/js/runtime/JSContext;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.js.lang.JavaScriptLanguage, com.oracle.truffle.api.source.SourceSection, com.oracle.truffle.api.frame.FrameDescriptor, com.oracle.truffle.js.runtime.JSContext);
    descriptor: (Lcom/oracle/truffle/js/lang/JavaScriptLanguage;Lcom/oracle/truffle/api/source/SourceSection;Lcom/oracle/truffle/api/frame/FrameDescriptor;Lcom/oracle/truffle/js/runtime/JSContext;)V
    flags: (0x0000) 
    Code:
      stack=4, locals=5, args_size=5
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1 this
        start local 1 // com.oracle.truffle.js.lang.JavaScriptLanguage $anonymous0
        start local 2 // com.oracle.truffle.api.source.SourceSection $anonymous1
        start local 3 // com.oracle.truffle.api.frame.FrameDescriptor $anonymous2
         0: .line 143
            aload 0 /* this */
            aload 4
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.val$context:Lcom/oracle/truffle/js/runtime/JSContext;
            aload 0 /* this */
            aload 1 /* $anonymous0 */
            aload 2 /* $anonymous1 */
            aload 3 /* $anonymous2 */
            invokespecial com.oracle.truffle.js.runtime.JavaScriptRootNode.<init>:(Lcom/oracle/truffle/js/lang/JavaScriptLanguage;Lcom/oracle/truffle/api/source/SourceSection;Lcom/oracle/truffle/api/frame/FrameDescriptor;)V
         1: .line 144
            aload 0 /* this */
            invokestatic com.oracle.truffle.api.profiles.ConditionProfile.createBinaryProfile:()Lcom/oracle/truffle/api/profiles/ConditionProfile;
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.isArrayBuffer:Lcom/oracle/truffle/api/profiles/ConditionProfile;
         2: .line 145
            aload 0 /* this */
            invokestatic com.oracle.truffle.api.profiles.ConditionProfile.createBinaryProfile:()Lcom/oracle/truffle/api/profiles/ConditionProfile;
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.isDirectByteBuffer:Lcom/oracle/truffle/api/profiles/ConditionProfile;
         3: .line 146
            aload 0 /* this */
            invokestatic com.oracle.truffle.api.profiles.BranchProfile.create:()Lcom/oracle/truffle/api/profiles/BranchProfile;
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.errorBranch:Lcom/oracle/truffle/api/profiles/BranchProfile;
         4: .line 143
            return
        end local 3 // com.oracle.truffle.api.frame.FrameDescriptor $anonymous2
        end local 2 // com.oracle.truffle.api.source.SourceSection $anonymous1
        end local 1 // com.oracle.truffle.js.lang.JavaScriptLanguage $anonymous0
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1 this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    5     0         this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBuffer$1;
            0    5     1  $anonymous0  Lcom/oracle/truffle/js/lang/JavaScriptLanguage;
            0    5     2  $anonymous1  Lcom/oracle/truffle/api/source/SourceSection;
            0    5     3  $anonymous2  Lcom/oracle/truffle/api/frame/FrameDescriptor;
    MethodParameters:
             Name  Flags
      $anonymous0  
      $anonymous1  
      $anonymous2  
      val$context  final

  public java.lang.Object execute(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=4, args_size=2
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1 this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 150
            aload 1 /* frame */
            invokeinterface com.oracle.truffle.api.frame.VirtualFrame.getArguments:()[Ljava/lang/Object;
            invokestatic com.oracle.truffle.js.runtime.JSArguments.getThisObject:([Ljava/lang/Object;)Ljava/lang/Object;
            astore 2 /* obj */
        start local 2 // java.lang.Object obj
         1: .line 151
            aload 2 /* obj */
            invokestatic com.oracle.truffle.js.runtime.objects.JSDynamicObject.isJSDynamicObject:(Ljava/lang/Object;)Z
            ifeq 11
         2: .line 152
            aload 2 /* obj */
            checkcast com.oracle.truffle.api.object.DynamicObject
            astore 3 /* buffer */
        start local 3 // com.oracle.truffle.api.object.DynamicObject buffer
         3: .line 153
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.isArrayBuffer:Lcom/oracle/truffle/api/profiles/ConditionProfile;
            aload 3 /* buffer */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSArrayBuffer.isJSHeapArrayBuffer:(Ljava/lang/Object;)Z
            invokevirtual com.oracle.truffle.api.profiles.ConditionProfile.profile:(Z)Z
            ifeq 7
         4: .line 154
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.val$context:Lcom/oracle/truffle/js/runtime/JSContext;
            invokevirtual com.oracle.truffle.js.runtime.JSContext.getTypedArrayNotDetachedAssumption:()Lcom/oracle/truffle/api/Assumption;
            invokeinterface com.oracle.truffle.api.Assumption.isValid:()Z
            ifne 6
            aload 3 /* buffer */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSArrayBuffer.isDetachedBuffer:(Lcom/oracle/truffle/api/object/DynamicObject;)Z
            ifeq 6
         5: .line 155
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.handleDetachedBuffer:()Ljava/lang/Object;
            areturn
         6: .line 157
      StackMap locals: java.lang.Object com.oracle.truffle.api.object.DynamicObject
      StackMap stack:
            aload 3 /* buffer */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSArrayBuffer.getByteLength:(Lcom/oracle/truffle/api/object/DynamicObject;)I
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            areturn
         7: .line 158
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.isDirectByteBuffer:Lcom/oracle/truffle/api/profiles/ConditionProfile;
            aload 3 /* buffer */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSArrayBuffer.isJSDirectArrayBuffer:(Ljava/lang/Object;)Z
            invokevirtual com.oracle.truffle.api.profiles.ConditionProfile.profile:(Z)Z
            ifeq 11
         8: .line 159
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.val$context:Lcom/oracle/truffle/js/runtime/JSContext;
            invokevirtual com.oracle.truffle.js.runtime.JSContext.getTypedArrayNotDetachedAssumption:()Lcom/oracle/truffle/api/Assumption;
            invokeinterface com.oracle.truffle.api.Assumption.isValid:()Z
            ifne 10
            aload 3 /* buffer */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSArrayBuffer.isDetachedBuffer:(Lcom/oracle/truffle/api/object/DynamicObject;)Z
            ifeq 10
         9: .line 160
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.handleDetachedBuffer:()Ljava/lang/Object;
            areturn
        10: .line 162
      StackMap locals:
      StackMap stack:
            aload 3 /* buffer */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSArrayBuffer.getDirectByteLength:(Lcom/oracle/truffle/api/object/DynamicObject;)I
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            areturn
        end local 3 // com.oracle.truffle.api.object.DynamicObject buffer
        11: .line 165
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.errorBranch:Lcom/oracle/truffle/api/profiles/BranchProfile;
            invokevirtual com.oracle.truffle.api.profiles.BranchProfile.enter:()V
        12: .line 166
            invokestatic com.oracle.truffle.js.runtime.Errors.createTypeErrorArrayBufferExpected:()Lcom/oracle/truffle/js/runtime/JSException;
            athrow
        end local 2 // java.lang.Object obj
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1 this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   13     0    this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBuffer$1;
            0   13     1   frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
            1   13     2     obj  Ljava/lang/Object;
            3   11     3  buffer  Lcom/oracle/truffle/api/object/DynamicObject;
    MethodParameters:
       Name  Flags
      frame  

  private java.lang.Object handleDetachedBuffer();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1 this
         0: .line 170
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1.val$context:Lcom/oracle/truffle/js/runtime/JSContext;
            invokevirtual com.oracle.truffle.js.runtime.JSContext.isOptionV8CompatibilityMode:()Z
            ifeq 2
         1: .line 171
            iconst_0
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            areturn
         2: .line 173
      StackMap locals:
      StackMap stack:
            invokestatic com.oracle.truffle.js.runtime.Errors.createTypeErrorDetachedBuffer:()Lcom/oracle/truffle/js/runtime/JSException;
            athrow
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBuffer$1;
}
SourceFile: "JSArrayBuffer.java"
EnclosingMethod: com.oracle.truffle.js.runtime.builtins.JSArrayBuffer.createByteLengthGetterCallTarget:(Lcom/oracle/truffle/js/runtime/JSContext;)Lcom/oracle/truffle/api/CallTarget;
NestHost: com.oracle.truffle.js.runtime.builtins.JSArrayBuffer
InnerClasses:
  com.oracle.truffle.js.runtime.builtins.JSArrayBuffer$1