https://www.graalvm.org/ 
final class com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location extends com.oracle.truffle.polyglot.PolyglotLocals$LocalLocation
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location
  super_class: com.oracle.truffle.polyglot.PolyglotLocals$LocalLocation
{
  final com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal this$1;
    descriptor: Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  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 248
            ldc Lcom/oracle/truffle/polyglot/PolyglotLocals;
            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.polyglot.PolyglotLocals$InstrumentContextLocal$Location.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal<?>, );
    descriptor: (Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal;Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal;I)V
    flags: (0x0000) 
    Code:
      stack=3, locals=4, args_size=4
        start local 0 // com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location this
        start local 2 // com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal local
        start local 3 // int index
         0: .line 250
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location.this$1:Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal;
         1: .line 251
            aload 0 /* this */
            aload 2 /* local */
            getfield com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal.instrument:Lcom/oracle/truffle/polyglot/PolyglotInstrument;
            getfield com.oracle.truffle.polyglot.PolyglotInstrument.engine:Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            iload 3 /* index */
            invokespecial com.oracle.truffle.polyglot.PolyglotLocals$LocalLocation.<init>:(Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;I)V
         2: .line 252
            return
        end local 3 // int index
        end local 2 // com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal local
        end local 0 // com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal$Location;
            0    3     2  local  Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal<*>;
            0    3     3  index  I
    Signature: (Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal<*>;I)V
    MethodParameters:
        Name  Flags
      this$0  final
      local   
      index   

  java.lang.Object invokeFactoryImpl(com.oracle.truffle.polyglot.PolyglotContextImpl, java.lang.Thread);
    descriptor: (Lcom/oracle/truffle/polyglot/PolyglotContextImpl;Ljava/lang/Thread;)Ljava/lang/Object;
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location this
        start local 1 // com.oracle.truffle.polyglot.PolyglotContextImpl context
        start local 2 // java.lang.Thread thread
         0: .line 256
            getstatic com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location.$assertionsDisabled:Z
            ifne 1
            aload 2 /* thread */
            ifnull 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 257
      StackMap locals:
      StackMap stack:
            aload 1 /* context */
            getfield com.oracle.truffle.polyglot.PolyglotContextImpl.engine:Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location.this$1:Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal;
            getfield com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal.instrument:Lcom/oracle/truffle/polyglot/PolyglotInstrument;
            getfield com.oracle.truffle.polyglot.PolyglotInstrument.engine:Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            if_acmpeq 3
         2: .line 258
            new java.lang.AssertionError
            dup
            ldc "Invalid sharing of locations."
            invokespecial java.lang.AssertionError.<init>:(Ljava/lang/Object;)V
            athrow
         3: .line 260
      StackMap locals:
      StackMap stack:
            getstatic com.oracle.truffle.polyglot.EngineAccessor.INSTRUMENT:Lcom/oracle/truffle/api/impl/Accessor$InstrumentSupport;
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location.this$1:Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal;
            getfield com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal.factory:Ljava/lang/Object;
            aload 1 /* context */
            getfield com.oracle.truffle.polyglot.PolyglotContextImpl.creatorTruffleContext:Lcom/oracle/truffle/api/TruffleContext;
            invokevirtual com.oracle.truffle.api.impl.Accessor$InstrumentSupport.invokeContextLocalFactory:(Ljava/lang/Object;Lcom/oracle/truffle/api/TruffleContext;)Ljava/lang/Object;
            areturn
        end local 2 // java.lang.Thread thread
        end local 1 // com.oracle.truffle.polyglot.PolyglotContextImpl context
        end local 0 // com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    4     0     this  Lcom/oracle/truffle/polyglot/PolyglotLocals$InstrumentContextLocal$Location;
            0    4     1  context  Lcom/oracle/truffle/polyglot/PolyglotContextImpl;
            0    4     2   thread  Ljava/lang/Thread;
    MethodParameters:
         Name  Flags
      context  
      thread   
}
SourceFile: "PolyglotLocals.java"
NestHost: com.oracle.truffle.polyglot.PolyglotLocals
InnerClasses:
  public abstract InstrumentSupport = com.oracle.truffle.api.impl.Accessor$InstrumentSupport of com.oracle.truffle.api.impl.Accessor
  final InstrumentContextLocal = com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal of com.oracle.truffle.polyglot.PolyglotLocals
  private final Location = com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal$Location of com.oracle.truffle.polyglot.PolyglotLocals$InstrumentContextLocal
  abstract LocalLocation = com.oracle.truffle.polyglot.PolyglotLocals$LocalLocation of com.oracle.truffle.polyglot.PolyglotLocals