https://www.graalvm.org/ 
abstract class com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase extends com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase
  super_class: com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod
{
  private com.oracle.truffle.api.CallTarget doInvokeTarget;
    descriptor: Lcom/oracle/truffle/api/CallTarget;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.CompilerDirectives$CompilationFinal()

  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 171
            ldc Lcom/oracle/truffle/polyglot/HostMethodDesc;
            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.HostMethodDesc$SingleMethod$ReflectBase.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(java.lang.reflect.Executable);
    descriptor: (Ljava/lang/reflect/Executable;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase this
        start local 1 // java.lang.reflect.Executable executable
         0: .line 176
            aload 0 /* this */
            aload 1 /* executable */
            invokespecial com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod.<init>:(Ljava/lang/reflect/Executable;)V
         1: .line 177
            return
        end local 1 // java.lang.reflect.Executable executable
        end local 0 // com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    2     0        this  Lcom/oracle/truffle/polyglot/HostMethodDesc$SingleMethod$ReflectBase;
            0    2     1  executable  Ljava/lang/reflect/Executable;
    MethodParameters:
            Name  Flags
      executable  

  public java.lang.Object invokeGuestToHost(java.lang.Object, java.lang.Object[], com.oracle.truffle.polyglot.PolyglotEngineImpl, com.oracle.truffle.polyglot.PolyglotLanguageContext, com.oracle.truffle.api.nodes.Node);
    descriptor: (Ljava/lang/Object;[Ljava/lang/Object;Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Lcom/oracle/truffle/api/nodes/Node;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=7, args_size=6
        start local 0 // com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase this
        start local 1 // java.lang.Object receiver
        start local 2 // java.lang.Object[] arguments
        start local 3 // com.oracle.truffle.polyglot.PolyglotEngineImpl engine
        start local 4 // com.oracle.truffle.polyglot.PolyglotLanguageContext languageContext
        start local 5 // com.oracle.truffle.api.nodes.Node node
         0: .line 181
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase.doInvokeTarget:Lcom/oracle/truffle/api/CallTarget;
            astore 6 /* target */
        start local 6 // com.oracle.truffle.api.CallTarget target
         1: .line 182
            aload 6 /* target */
            ifnonnull 4
         2: .line 183
            invokestatic com.oracle.truffle.api.CompilerDirectives.transferToInterpreterAndInvalidate:()V
         3: .line 184
            aload 0 /* this */
            aload 4 /* languageContext */
            getfield com.oracle.truffle.polyglot.PolyglotLanguageContext.context:Lcom/oracle/truffle/polyglot/PolyglotContextImpl;
            getfield com.oracle.truffle.polyglot.PolyglotContextImpl.engine:Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            invokevirtual com.oracle.truffle.polyglot.PolyglotEngineImpl.getHostToGuestCodeCache:()Lcom/oracle/truffle/polyglot/HostToGuestCodeCache;
            getfield com.oracle.truffle.polyglot.HostToGuestCodeCache.reflectionHostInvoke:Lcom/oracle/truffle/api/CallTarget;
            dup
            astore 6 /* target */
            putfield com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase.doInvokeTarget:Lcom/oracle/truffle/api/CallTarget;
         4: .line 186
      StackMap locals: com.oracle.truffle.api.CallTarget
      StackMap stack:
            getstatic com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase.$assertionsDisabled:Z
            ifne 5
            aload 6 /* target */
            aload 4 /* languageContext */
            getfield com.oracle.truffle.polyglot.PolyglotLanguageContext.context:Lcom/oracle/truffle/polyglot/PolyglotContextImpl;
            getfield com.oracle.truffle.polyglot.PolyglotContextImpl.engine:Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            invokevirtual com.oracle.truffle.polyglot.PolyglotEngineImpl.getHostToGuestCodeCache:()Lcom/oracle/truffle/polyglot/HostToGuestCodeCache;
            getfield com.oracle.truffle.polyglot.HostToGuestCodeCache.reflectionHostInvoke:Lcom/oracle/truffle/api/CallTarget;
            if_acmpeq 5
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         5: .line 188
      StackMap locals:
      StackMap stack:
            aload 5 /* node */
            aload 6 /* target */
            iconst_4
            anewarray java.lang.Object
            dup
            iconst_0
            aload 4 /* languageContext */
            aastore
            dup
            iconst_1
            aload 1 /* receiver */
            aastore
            dup
            iconst_2
            aload 0 /* this */
            aastore
            dup
            iconst_3
            aload 2 /* arguments */
            aastore
            invokestatic com.oracle.truffle.polyglot.GuestToHostRootNode.guestToHostCall:(Lcom/oracle/truffle/api/nodes/Node;Lcom/oracle/truffle/api/CallTarget;[Ljava/lang/Object;)Ljava/lang/Object;
            areturn
        end local 6 // com.oracle.truffle.api.CallTarget target
        end local 5 // com.oracle.truffle.api.nodes.Node node
        end local 4 // com.oracle.truffle.polyglot.PolyglotLanguageContext languageContext
        end local 3 // com.oracle.truffle.polyglot.PolyglotEngineImpl engine
        end local 2 // java.lang.Object[] arguments
        end local 1 // java.lang.Object receiver
        end local 0 // com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    6     0             this  Lcom/oracle/truffle/polyglot/HostMethodDesc$SingleMethod$ReflectBase;
            0    6     1         receiver  Ljava/lang/Object;
            0    6     2        arguments  [Ljava/lang/Object;
            0    6     3           engine  Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            0    6     4  languageContext  Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;
            0    6     5             node  Lcom/oracle/truffle/api/nodes/Node;
            1    6     6           target  Lcom/oracle/truffle/api/CallTarget;
    MethodParameters:
                 Name  Flags
      receiver         
      arguments        
      engine           
      languageContext  
      node             
}
SourceFile: "HostMethodDesc.java"
NestHost: com.oracle.truffle.polyglot.HostMethodDesc
InnerClasses:
  public abstract CompilationFinal = com.oracle.truffle.api.CompilerDirectives$CompilationFinal of com.oracle.truffle.api.CompilerDirectives
  abstract SingleMethod = com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod of com.oracle.truffle.polyglot.HostMethodDesc
  abstract ReflectBase = com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod$ReflectBase of com.oracle.truffle.polyglot.HostMethodDesc$SingleMethod