https://www.graalvm.org/ 
class com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1 extends com.oracle.truffle.api.nodes.RootNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1
  super_class: com.oracle.truffle.api.nodes.RootNode
{
  final com.oracle.truffle.api.test.polyglot.LanguageSPITest$35 this$1;
    descriptor: Lcom/oracle/truffle/api/test/polyglot/LanguageSPITest$35;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final java.util.function.Function val$languageResolver;
    descriptor: Ljava/util/function/Function;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  private final java.util.concurrent.atomic.AtomicReference val$exception;
    descriptor: Ljava/util/concurrent/atomic/AtomicReference;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.api.test.polyglot.LanguageSPITest$35, com.oracle.truffle.api.TruffleLanguage, java.util.function.Function, java.util.concurrent.atomic.AtomicReference);
    descriptor: (Lcom/oracle/truffle/api/test/polyglot/LanguageSPITest$35;Lcom/oracle/truffle/api/TruffleLanguage;Ljava/util/function/Function;Ljava/util/concurrent/atomic/AtomicReference;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=5, args_size=5
        start local 0 // com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1 this
        start local 2 // com.oracle.truffle.api.TruffleLanguage $anonymous0
         0: .line 2071
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1.this$1:Lcom/oracle/truffle/api/test/polyglot/LanguageSPITest$35;
            aload 0 /* this */
            aload 3
            putfield com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1.val$languageResolver:Ljava/util/function/Function;
            aload 0 /* this */
            aload 4
            putfield com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1.val$exception:Ljava/util/concurrent/atomic/AtomicReference;
            aload 0 /* this */
            aload 2 /* $anonymous0 */
            invokespecial com.oracle.truffle.api.nodes.RootNode.<init>:(Lcom/oracle/truffle/api/TruffleLanguage;)V
            return
        end local 2 // com.oracle.truffle.api.TruffleLanguage $anonymous0
        end local 0 // com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1 this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    1     0         this  Lcom/oracle/truffle/api/test/polyglot/LanguageSPITest$35$1;
            0    1     2  $anonymous0  Lcom/oracle/truffle/api/TruffleLanguage<*>;
    MethodParameters:
                      Name  Flags
      this$0                final
      $anonymous0           
      val$languageResolver  final
      val$exception         final

  public java.lang.Object execute(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=5, args_size=2
        start local 0 // com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1 this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 2074
            aload 0 /* this */
            ldc Lcom/oracle/truffle/api/test/polyglot/ProxyLanguage;
            invokevirtual com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1.lookupContextReference:(Ljava/lang/Class;)Lcom/oracle/truffle/api/TruffleLanguage$ContextReference;
            invokevirtual com.oracle.truffle.api.TruffleLanguage$ContextReference.get:()Ljava/lang/Object;
            checkcast com.oracle.truffle.api.test.polyglot.ProxyLanguage$LanguageContext
            invokevirtual com.oracle.truffle.api.test.polyglot.ProxyLanguage$LanguageContext.getEnv:()Lcom/oracle/truffle/api/TruffleLanguage$Env;
            astore 2 /* env */
        start local 2 // com.oracle.truffle.api.TruffleLanguage$Env env
         1: .line 2075
            aload 0 /* this */
            getfield com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1.val$languageResolver:Ljava/util/function/Function;
            aload 2 /* env */
            invokeinterface java.util.function.Function.apply:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.oracle.truffle.api.nodes.LanguageInfo
            astore 3 /* languageToInitialize */
        start local 3 // com.oracle.truffle.api.nodes.LanguageInfo languageToInitialize
         2: .line 2076
            aload 3 /* languageToInitialize */
            invokestatic org.junit.Assert.assertNotNull:(Ljava/lang/Object;)V
         3: .line 2078
            aload 2 /* env */
            aload 3 /* languageToInitialize */
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.initializeLanguage:(Lcom/oracle/truffle/api/nodes/LanguageInfo;)Z
            invokestatic org.junit.Assert.assertTrue:(Z)V
         4: .line 2079
            goto 7
      StackMap locals: com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1 com.oracle.truffle.api.frame.VirtualFrame com.oracle.truffle.api.TruffleLanguage$Env com.oracle.truffle.api.nodes.LanguageInfo
      StackMap stack: java.lang.SecurityException
         5: astore 4 /* se */
        start local 4 // java.lang.SecurityException se
         6: .line 2080
            aload 0 /* this */
            getfield com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1.val$exception:Ljava/util/concurrent/atomic/AtomicReference;
            aload 4 /* se */
            invokevirtual java.util.concurrent.atomic.AtomicReference.set:(Ljava/lang/Object;)V
        end local 4 // java.lang.SecurityException se
         7: .line 2082
      StackMap locals:
      StackMap stack:
            iconst_1
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            areturn
        end local 3 // com.oracle.truffle.api.nodes.LanguageInfo languageToInitialize
        end local 2 // com.oracle.truffle.api.TruffleLanguage$Env env
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1 this
      LocalVariableTable:
        Start  End  Slot                  Name  Signature
            0    8     0                  this  Lcom/oracle/truffle/api/test/polyglot/LanguageSPITest$35$1;
            0    8     1                 frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
            1    8     2                   env  Lcom/oracle/truffle/api/TruffleLanguage$Env;
            2    8     3  languageToInitialize  Lcom/oracle/truffle/api/nodes/LanguageInfo;
            6    7     4                    se  Ljava/lang/SecurityException;
      Exception table:
        from    to  target  type
           3     4       5  Class java.lang.SecurityException
    MethodParameters:
       Name  Flags
      frame  
}
SourceFile: "LanguageSPITest.java"
EnclosingMethod: com.oracle.truffle.api.test.polyglot.LanguageSPITest$35.parse:(Lcom/oracle/truffle/api/TruffleLanguage$ParsingRequest;)Lcom/oracle/truffle/api/CallTarget;
NestHost: com.oracle.truffle.api.test.polyglot.LanguageSPITest
InnerClasses:
  public abstract ContextReference = com.oracle.truffle.api.TruffleLanguage$ContextReference of com.oracle.truffle.api.TruffleLanguage
  public final Env = com.oracle.truffle.api.TruffleLanguage$Env of com.oracle.truffle.api.TruffleLanguage
  public final ParsingRequest = com.oracle.truffle.api.TruffleLanguage$ParsingRequest of com.oracle.truffle.api.TruffleLanguage
  com.oracle.truffle.api.test.polyglot.LanguageSPITest$35
  com.oracle.truffle.api.test.polyglot.LanguageSPITest$35$1
  public LanguageContext = com.oracle.truffle.api.test.polyglot.ProxyLanguage$LanguageContext of com.oracle.truffle.api.test.polyglot.ProxyLanguage