https://www.graalvm.org/ 
abstract class com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy extends com.oracle.truffle.js.runtime.builtins.JSObjectFactory
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy
  super_class: com.oracle.truffle.js.runtime.builtins.JSObjectFactory
{
  private com.oracle.truffle.api.object.Shape factory;
    descriptor: Lcom/oracle/truffle/api/object/Shape;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.CompilerDirectives$CompilationFinal()

  private final int slot;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  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 261
            ldc Lcom/oracle/truffle/js/runtime/builtins/JSObjectFactory;
            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.JSObjectFactory$Lazy.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  protected void <init>(com.oracle.truffle.js.runtime.JSContext, int);
    descriptor: (Lcom/oracle/truffle/js/runtime/JSContext;I)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy this
        start local 1 // com.oracle.truffle.js.runtime.JSContext context
        start local 2 // int slot
         0: .line 266
            aload 0 /* this */
            aload 1 /* context */
            aload 1 /* context */
            invokevirtual com.oracle.truffle.js.runtime.JSContext.isMultiContext:()Z
            invokespecial com.oracle.truffle.js.runtime.builtins.JSObjectFactory.<init>:(Lcom/oracle/truffle/js/runtime/JSContext;Z)V
         1: .line 267
            aload 0 /* this */
            iload 2 /* slot */
            putfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.slot:I
         2: .line 268
            return
        end local 2 // int slot
        end local 1 // com.oracle.truffle.js.runtime.JSContext context
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    3     0     this  Lcom/oracle/truffle/js/runtime/builtins/JSObjectFactory$Lazy;
            0    3     1  context  Lcom/oracle/truffle/js/runtime/JSContext;
            0    3     2     slot  I
    MethodParameters:
         Name  Flags
      context  
      slot     

  protected final com.oracle.truffle.api.object.Shape getShape(com.oracle.truffle.js.runtime.JSRealm, com.oracle.truffle.api.object.DynamicObject);
    descriptor: (Lcom/oracle/truffle/js/runtime/JSRealm;Lcom/oracle/truffle/api/object/DynamicObject;)Lcom/oracle/truffle/api/object/Shape;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=4, locals=5, args_size=3
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy this
        start local 1 // com.oracle.truffle.js.runtime.JSRealm realm
        start local 2 // com.oracle.truffle.api.object.DynamicObject prototype
         0: .line 272
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.context:Lcom/oracle/truffle/js/runtime/JSContext;
            invokevirtual com.oracle.truffle.js.runtime.JSContext.isMultiContext:()Z
            ifeq 8
         1: .line 273
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.factory:Lcom/oracle/truffle/api/object/Shape;
            ifnonnull 7
         2: .line 274
            invokestatic com.oracle.truffle.api.CompilerDirectives.transferToInterpreterAndInvalidate:()V
         3: .line 275
            aload 0 /* this */
            aload 0 /* this */
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.isInObjectProto:()Z
            ifeq 4
            aconst_null
            goto 5
      StackMap locals: com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy com.oracle.truffle.js.runtime.JSRealm com.oracle.truffle.api.object.DynamicObject
      StackMap stack: com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy
         4: aload 2 /* prototype */
      StackMap locals: com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy com.oracle.truffle.js.runtime.JSRealm com.oracle.truffle.api.object.DynamicObject
      StackMap stack: com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy com.oracle.truffle.api.object.DynamicObject
         5: invokevirtual com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.makeInitialShape:(Lcom/oracle/truffle/api/object/DynamicObject;)Lcom/oracle/truffle/api/object/Shape;
            putfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.factory:Lcom/oracle/truffle/api/object/Shape;
         6: .line 276
            getstatic com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.$assertionsDisabled:Z
            ifne 7
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.isInObjectProto:()Z
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.factory:Lcom/oracle/truffle/api/object/Shape;
            invokestatic com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.hasInObjectProto:(Lcom/oracle/truffle/api/object/Shape;)Z
            if_icmpeq 7
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         7: .line 278
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.factory:Lcom/oracle/truffle/api/object/Shape;
            areturn
         8: .line 280
      StackMap locals:
      StackMap stack:
            aload 1 /* realm */
            invokevirtual com.oracle.truffle.js.runtime.JSRealm.getObjectFactories:()Lcom/oracle/truffle/js/runtime/builtins/JSObjectFactory$RealmData;
            getfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$RealmData.shapes:[Lcom/oracle/truffle/api/object/Shape;
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.slot:I
            aaload
            astore 3 /* realmFactory */
        start local 3 // com.oracle.truffle.api.object.Shape realmFactory
         9: .line 281
            aload 3 /* realmFactory */
            ifnonnull 14
        10: .line 282
            invokestatic com.oracle.truffle.api.CompilerDirectives.transferToInterpreterAndInvalidate:()V
        11: .line 283
            aload 0 /* this */
            aload 2 /* prototype */
            invokevirtual com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.makeInitialShape:(Lcom/oracle/truffle/api/object/DynamicObject;)Lcom/oracle/truffle/api/object/Shape;
            astore 4 /* newFactory */
        start local 4 // com.oracle.truffle.api.object.Shape newFactory
        12: .line 284
            aload 1 /* realm */
            invokevirtual com.oracle.truffle.js.runtime.JSRealm.getObjectFactories:()Lcom/oracle/truffle/js/runtime/builtins/JSObjectFactory$RealmData;
            getfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$RealmData.shapes:[Lcom/oracle/truffle/api/object/Shape;
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.slot:I
            aload 4 /* newFactory */
            dup_x2
            aastore
            astore 3 /* realmFactory */
        13: .line 285
            getstatic com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.$assertionsDisabled:Z
            ifne 14
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.isInObjectProto:()Z
            aload 3 /* realmFactory */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy.hasInObjectProto:(Lcom/oracle/truffle/api/object/Shape;)Z
            if_icmpeq 14
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
        end local 4 // com.oracle.truffle.api.object.Shape newFactory
        14: .line 287
      StackMap locals: com.oracle.truffle.api.object.Shape
      StackMap stack:
            aload 3 /* realmFactory */
            areturn
        end local 3 // com.oracle.truffle.api.object.Shape realmFactory
        end local 2 // com.oracle.truffle.api.object.DynamicObject prototype
        end local 1 // com.oracle.truffle.js.runtime.JSRealm realm
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0   15     0          this  Lcom/oracle/truffle/js/runtime/builtins/JSObjectFactory$Lazy;
            0   15     1         realm  Lcom/oracle/truffle/js/runtime/JSRealm;
            0   15     2     prototype  Lcom/oracle/truffle/api/object/DynamicObject;
            9   15     3  realmFactory  Lcom/oracle/truffle/api/object/Shape;
           12   14     4    newFactory  Lcom/oracle/truffle/api/object/Shape;
    MethodParameters:
           Name  Flags
      realm      
      prototype  

  protected abstract com.oracle.truffle.api.object.Shape makeInitialShape(com.oracle.truffle.api.object.DynamicObject);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;)Lcom/oracle/truffle/api/object/Shape;
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    MethodParameters:
           Name  Flags
      prototype  
}
SourceFile: "JSObjectFactory.java"
NestHost: com.oracle.truffle.js.runtime.builtins.JSObjectFactory
InnerClasses:
  public abstract CompilationFinal = com.oracle.truffle.api.CompilerDirectives$CompilationFinal of com.oracle.truffle.api.CompilerDirectives
  private abstract Lazy = com.oracle.truffle.js.runtime.builtins.JSObjectFactory$Lazy of com.oracle.truffle.js.runtime.builtins.JSObjectFactory
  public final RealmData = com.oracle.truffle.js.runtime.builtins.JSObjectFactory$RealmData of com.oracle.truffle.js.runtime.builtins.JSObjectFactory