https://www.graalvm.org/ 
class com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$ThreadRequest
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$ThreadRequest
  super_class: java.lang.Object
{
  final com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$LanguageContext context;
    descriptor: Lcom/oracle/truffle/api/test/polyglot/MultiThreadedLanguage$LanguageContext;
    flags: (0x0010) ACC_FINAL

  final java.lang.Thread thread;
    descriptor: Ljava/lang/Thread;
    flags: (0x0010) ACC_FINAL

  final boolean singleThreaded;
    descriptor: Z
    flags: (0x0010) ACC_FINAL

  void <init>(com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$LanguageContext, java.lang.Thread, boolean);
    descriptor: (Lcom/oracle/truffle/api/test/polyglot/MultiThreadedLanguage$LanguageContext;Ljava/lang/Thread;Z)V
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$ThreadRequest this
        start local 1 // com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$LanguageContext context
        start local 2 // java.lang.Thread thread
        start local 3 // boolean singleThreaded
         0: .line 82
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 83
            aload 0 /* this */
            aload 1 /* context */
            putfield com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$ThreadRequest.context:Lcom/oracle/truffle/api/test/polyglot/MultiThreadedLanguage$LanguageContext;
         2: .line 84
            aload 0 /* this */
            aload 2 /* thread */
            putfield com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$ThreadRequest.thread:Ljava/lang/Thread;
         3: .line 85
            aload 0 /* this */
            iload 3 /* singleThreaded */
            putfield com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$ThreadRequest.singleThreaded:Z
         4: .line 86
            return
        end local 3 // boolean singleThreaded
        end local 2 // java.lang.Thread thread
        end local 1 // com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$LanguageContext context
        end local 0 // com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$ThreadRequest this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    5     0            this  Lcom/oracle/truffle/api/test/polyglot/MultiThreadedLanguage$ThreadRequest;
            0    5     1         context  Lcom/oracle/truffle/api/test/polyglot/MultiThreadedLanguage$LanguageContext;
            0    5     2          thread  Ljava/lang/Thread;
            0    5     3  singleThreaded  Z
    MethodParameters:
                Name  Flags
      context         
      thread          
      singleThreaded  
}
SourceFile: "MultiThreadedLanguage.java"
NestHost: com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage
InnerClasses:
  LanguageContext = com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$LanguageContext of com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage
  ThreadRequest = com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage$ThreadRequest of com.oracle.truffle.api.test.polyglot.MultiThreadedLanguage