https://www.graalvm.org/ 
class com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData extends com.oracle.truffle.object.DynamicObjectLibraryImpl$CacheData<com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData
  super_class: com.oracle.truffle.object.DynamicObjectLibraryImpl$CacheData
{
  static final com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData GENERIC;
    descriptor: Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  final com.oracle.truffle.api.object.Shape newShape;
    descriptor: Lcom/oracle/truffle/api/object/Shape;
    flags: (0x0010) ACC_FINAL

  final com.oracle.truffle.api.Assumption newShapeValidAssumption;
    descriptor: Lcom/oracle/truffle/api/Assumption;
    flags: (0x0010) ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=5, locals=0, args_size=0
         0: .line 1572
            new com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData
            dup
            aconst_null
            aconst_null
            aconst_null
            invokespecial com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.<init>:(Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;Lcom/oracle/truffle/api/object/Shape;Lcom/oracle/truffle/api/Assumption;)V
            putstatic com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.GENERIC:Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData, com.oracle.truffle.api.object.Shape, com.oracle.truffle.api.Assumption);
    descriptor: (Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;Lcom/oracle/truffle/api/object/Shape;Lcom/oracle/truffle/api/Assumption;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData this
        start local 1 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData next
        start local 2 // com.oracle.truffle.api.object.Shape newShape
        start local 3 // com.oracle.truffle.api.Assumption newShapeValidAssumption
         0: .line 1578
            aload 0 /* this */
            aload 1 /* next */
            invokespecial com.oracle.truffle.object.DynamicObjectLibraryImpl$CacheData.<init>:(Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$CacheData;)V
         1: .line 1579
            aload 0 /* this */
            aload 2 /* newShape */
            putfield com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.newShape:Lcom/oracle/truffle/api/object/Shape;
         2: .line 1580
            aload 0 /* this */
            aload 3 /* newShapeValidAssumption */
            putfield com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.newShapeValidAssumption:Lcom/oracle/truffle/api/Assumption;
         3: .line 1581
            return
        end local 3 // com.oracle.truffle.api.Assumption newShapeValidAssumption
        end local 2 // com.oracle.truffle.api.object.Shape newShape
        end local 1 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData next
        end local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData this
      LocalVariableTable:
        Start  End  Slot                     Name  Signature
            0    4     0                     this  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
            0    4     1                     next  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
            0    4     2                 newShape  Lcom/oracle/truffle/api/object/Shape;
            0    4     3  newShapeValidAssumption  Lcom/oracle/truffle/api/Assumption;
    MethodParameters:
                         Name  Flags
      next                     
      newShape                 
      newShapeValidAssumption  

  protected boolean isValid();
    descriptor: ()Z
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData this
         0: .line 1585
            aload 0 /* this */
            getfield com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.newShapeValidAssumption:Lcom/oracle/truffle/api/Assumption;
            getstatic com.oracle.truffle.api.utilities.NeverValidAssumption.INSTANCE:Lcom/oracle/truffle/api/utilities/NeverValidAssumption;
            if_acmpeq 1
            aload 0 /* this */
            getfield com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.newShapeValidAssumption:Lcom/oracle/truffle/api/Assumption;
            invokeinterface com.oracle.truffle.api.Assumption.isValid:()Z
            ifne 1
            iconst_0
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_1
            ireturn
        end local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;

  protected void maybeUpdateShape(com.oracle.truffle.api.object.DynamicObject);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData this
        start local 1 // com.oracle.truffle.api.object.DynamicObject store
         0: .line 1589
            aload 0 /* this */
            getfield com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.newShapeValidAssumption:Lcom/oracle/truffle/api/Assumption;
            getstatic com.oracle.truffle.api.utilities.NeverValidAssumption.INSTANCE:Lcom/oracle/truffle/api/utilities/NeverValidAssumption;
            if_acmpne 2
         1: .line 1590
            aload 1 /* store */
            invokestatic com.oracle.truffle.object.DynamicObjectLibraryImpl.updateShapeImpl:(Lcom/oracle/truffle/api/object/DynamicObject;)Z
            pop
         2: .line 1592
      StackMap locals:
      StackMap stack:
            return
        end local 1 // com.oracle.truffle.api.object.DynamicObject store
        end local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
            0    3     1  store  Lcom/oracle/truffle/api/object/DynamicObject;
    MethodParameters:
       Name  Flags
      store  

  protected com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData withNext(com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData);
    descriptor: (Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;)Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData this
        start local 1 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData newNext
         0: .line 1596
            new com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData
            dup
            aload 0 /* this */
            getfield com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.next:Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$CacheData;
            checkcast com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData
            aload 0 /* this */
            getfield com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.newShape:Lcom/oracle/truffle/api/object/Shape;
            aload 0 /* this */
            getfield com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.newShapeValidAssumption:Lcom/oracle/truffle/api/Assumption;
            invokespecial com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.<init>:(Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;Lcom/oracle/truffle/api/object/Shape;Lcom/oracle/truffle/api/Assumption;)V
            areturn
        end local 1 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData newNext
        end local 0 // com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
            0    1     1  newNext  Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
    MethodParameters:
         Name  Flags
      newNext  

  protected com.oracle.truffle.object.DynamicObjectLibraryImpl$CacheData withNext(com.oracle.truffle.object.DynamicObjectLibraryImpl$CacheData);
    descriptor: (Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$CacheData;)Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$CacheData;
    flags: (0x1044) ACC_PROTECTED, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData
            invokevirtual com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData.withNext:(Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;)Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$CacheData<Lcom/oracle/truffle/object/DynamicObjectLibraryImpl$MutateCacheData;>;
SourceFile: "DynamicObjectLibraryImpl.java"
NestHost: com.oracle.truffle.object.DynamicObjectLibraryImpl
InnerClasses:
  abstract CacheData = com.oracle.truffle.object.DynamicObjectLibraryImpl$CacheData of com.oracle.truffle.object.DynamicObjectLibraryImpl
  MutateCacheData = com.oracle.truffle.object.DynamicObjectLibraryImpl$MutateCacheData of com.oracle.truffle.object.DynamicObjectLibraryImpl