https://www.graalvm.org/ 
public abstract class com.oracle.truffle.js.runtime.builtins.JSArrayBase extends com.oracle.truffle.js.runtime.objects.JSNonProxyObject
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.runtime.builtins.JSArrayBase
  super_class: com.oracle.truffle.js.runtime.objects.JSNonProxyObject
{
  int length;
    descriptor: I
    flags: (0x0000) 

  int usedLength;
    descriptor: I
    flags: (0x0000) 

  int indexOffset;
    descriptor: I
    flags: (0x0000) 

  int arrayOffset;
    descriptor: I
    flags: (0x0000) 

  int holeCount;
    descriptor: I
    flags: (0x0000) 

  java.lang.Object arrayStorage;
    descriptor: Ljava/lang/Object;
    flags: (0x0000) 

  com.oracle.truffle.js.runtime.array.ScriptArray arrayStrategy;
    descriptor: Lcom/oracle/truffle/js/runtime/array/ScriptArray;
    flags: (0x0000) 

  com.oracle.truffle.js.runtime.array.ArrayAllocationSite allocationSite;
    descriptor: Lcom/oracle/truffle/js/runtime/array/ArrayAllocationSite;
    flags: (0x0000) 

  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 54
            ldc Lcom/oracle/truffle/js/runtime/builtins/JSArrayBase;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic com.oracle.truffle.js.runtime.builtins.JSArrayBase.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  protected void <init>(com.oracle.truffle.api.object.Shape, com.oracle.truffle.js.runtime.array.ScriptArray, java.lang.Object, com.oracle.truffle.js.runtime.array.ArrayAllocationSite, long, int, int, int, int);
    descriptor: (Lcom/oracle/truffle/api/object/Shape;Lcom/oracle/truffle/js/runtime/array/ScriptArray;Ljava/lang/Object;Lcom/oracle/truffle/js/runtime/array/ArrayAllocationSite;JIIII)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=11, args_size=10
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
        start local 1 // com.oracle.truffle.api.object.Shape shape
        start local 2 // com.oracle.truffle.js.runtime.array.ScriptArray arrayType
        start local 3 // java.lang.Object array
        start local 4 // com.oracle.truffle.js.runtime.array.ArrayAllocationSite site
        start local 5 // long length
        start local 7 // int usedLength
        start local 8 // int indexOffset
        start local 9 // int arrayOffset
        start local 10 // int holeCount
         0: .line 56
            aload 0 /* this */
            aload 1 /* shape */
            invokespecial com.oracle.truffle.js.runtime.objects.JSNonProxyObject.<init>:(Lcom/oracle/truffle/api/object/Shape;)V
         1: .line 57
            getstatic com.oracle.truffle.js.runtime.builtins.JSArrayBase.$assertionsDisabled:Z
            ifne 2
            lload 5 /* length */
            invokestatic com.oracle.truffle.js.runtime.JSRuntime.isRepresentableAsUnsignedInt:(J)Z
            ifne 2
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         2: .line 58
      StackMap locals: com.oracle.truffle.js.runtime.builtins.JSArrayBase com.oracle.truffle.api.object.Shape com.oracle.truffle.js.runtime.array.ScriptArray java.lang.Object com.oracle.truffle.js.runtime.array.ArrayAllocationSite long int int int int
      StackMap stack:
            aload 0 /* this */
            aload 3 /* array */
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;)Ljava/lang/Object;
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.arrayStorage:Ljava/lang/Object;
         3: .line 59
            aload 0 /* this */
            aload 2 /* arrayType */
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.arrayStrategy:Lcom/oracle/truffle/js/runtime/array/ScriptArray;
         4: .line 60
            aload 0 /* this */
            lload 5 /* length */
            l2i
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.length:I
         5: .line 61
            aload 0 /* this */
            iload 7 /* usedLength */
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.usedLength:I
         6: .line 62
            aload 0 /* this */
            iload 8 /* indexOffset */
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.indexOffset:I
         7: .line 63
            aload 0 /* this */
            iload 9 /* arrayOffset */
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.arrayOffset:I
         8: .line 64
            aload 0 /* this */
            iload 10 /* holeCount */
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.holeCount:I
         9: .line 65
            aload 0 /* this */
            aload 4 /* site */
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.allocationSite:Lcom/oracle/truffle/js/runtime/array/ArrayAllocationSite;
        10: .line 66
            return
        end local 10 // int holeCount
        end local 9 // int arrayOffset
        end local 8 // int indexOffset
        end local 7 // int usedLength
        end local 5 // long length
        end local 4 // com.oracle.truffle.js.runtime.array.ArrayAllocationSite site
        end local 3 // java.lang.Object array
        end local 2 // com.oracle.truffle.js.runtime.array.ScriptArray arrayType
        end local 1 // com.oracle.truffle.api.object.Shape shape
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0   11     0         this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBase;
            0   11     1        shape  Lcom/oracle/truffle/api/object/Shape;
            0   11     2    arrayType  Lcom/oracle/truffle/js/runtime/array/ScriptArray;
            0   11     3        array  Ljava/lang/Object;
            0   11     4         site  Lcom/oracle/truffle/js/runtime/array/ArrayAllocationSite;
            0   11     5       length  J
            0   11     7   usedLength  I
            0   11     8  indexOffset  I
            0   11     9  arrayOffset  I
            0   11    10    holeCount  I
    MethodParameters:
             Name  Flags
      shape        
      arrayType    
      array        
      site         
      length       
      usedLength   
      indexOffset  
      arrayOffset  
      holeCount    

  public final com.oracle.truffle.js.runtime.builtins.ArrayAccess arrayAccess();
    descriptor: ()Lcom/oracle/truffle/js/runtime/builtins/ArrayAccess;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
         0: .line 79
            getstatic com.oracle.truffle.js.runtime.builtins.ArrayAccess.SINGLETON:Lcom/oracle/truffle/js/runtime/builtins/ArrayAccess;
            areturn
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBase;

  public final com.oracle.truffle.js.runtime.array.ScriptArray getArrayType();
    descriptor: ()Lcom/oracle/truffle/js/runtime/array/ScriptArray;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
         0: .line 83
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.arrayStrategy:Lcom/oracle/truffle/js/runtime/array/ScriptArray;
            areturn
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBase;

  public final void setArrayType(com.oracle.truffle.js.runtime.array.ScriptArray);
    descriptor: (Lcom/oracle/truffle/js/runtime/array/ScriptArray;)V
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
        start local 1 // com.oracle.truffle.js.runtime.array.ScriptArray arrayType
         0: .line 87
            aload 0 /* this */
            aload 1 /* arrayType */
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.arrayStrategy:Lcom/oracle/truffle/js/runtime/array/ScriptArray;
         1: .line 88
            return
        end local 1 // com.oracle.truffle.js.runtime.array.ScriptArray arrayType
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBase;
            0    2     1  arrayType  Lcom/oracle/truffle/js/runtime/array/ScriptArray;
    MethodParameters:
           Name  Flags
      arrayType  

  public final java.lang.Object getArray();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
         0: .line 91
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.arrayStorage:Ljava/lang/Object;
            areturn
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBase;

  public final void setArray(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
        start local 1 // java.lang.Object array
         0: .line 95
            aload 0 /* this */
            aload 1 /* array */
            invokestatic java.util.Objects.requireNonNull:(Ljava/lang/Object;)Ljava/lang/Object;
            putfield com.oracle.truffle.js.runtime.builtins.JSArrayBase.arrayStorage:Ljava/lang/Object;
         1: .line 96
            return
        end local 1 // java.lang.Object array
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSArrayBase this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lcom/oracle/truffle/js/runtime/builtins/JSArrayBase;
            0    2     1  array  Ljava/lang/Object;
    MethodParameters:
       Name  Flags
      array  
}
SourceFile: "JSArrayBase.java"