https://www.graalvm.org/ 
abstract class com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode extends com.oracle.truffle.polyglot.PolyglotMap$Cache$PolyglotMapNode
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode
  super_class: com.oracle.truffle.polyglot.PolyglotMap$Cache$PolyglotMapNode
{
  void <init>(com.oracle.truffle.polyglot.PolyglotMap$Cache);
    descriptor: (Lcom/oracle/truffle/polyglot/PolyglotMap$Cache;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode this
        start local 1 // com.oracle.truffle.polyglot.PolyglotMap$Cache cache
         0: .line 474
            aload 0 /* this */
            aload 1 /* cache */
            invokespecial com.oracle.truffle.polyglot.PolyglotMap$Cache$PolyglotMapNode.<init>:(Lcom/oracle/truffle/polyglot/PolyglotMap$Cache;)V
         1: .line 475
            return
        end local 1 // com.oracle.truffle.polyglot.PolyglotMap$Cache cache
        end local 0 // com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lcom/oracle/truffle/polyglot/PolyglotMap$Cache$ContainsKeyNode;
            0    2     1  cache  Lcom/oracle/truffle/polyglot/PolyglotMap$Cache;
    MethodParameters:
       Name  Flags
      cache  

  protected java.lang.Object doCached(com.oracle.truffle.polyglot.PolyglotLanguageContext, java.lang.Object, java.lang.Object[], com.oracle.truffle.api.interop.InteropLibrary);
    descriptor: (Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Ljava/lang/Object;[Ljava/lang/Object;Lcom/oracle/truffle/api/interop/InteropLibrary;)Ljava/lang/Object;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=6, args_size=5
        start local 0 // com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode this
        start local 1 // com.oracle.truffle.polyglot.PolyglotLanguageContext languageContext
        start local 2 // java.lang.Object receiver
        start local 3 // java.lang.Object[] args
        start local 4 // com.oracle.truffle.api.interop.InteropLibrary interop
         0: .line 481
            aload 3 /* args */
            iconst_2
            aaload
            astore 5 /* key */
        start local 5 // java.lang.Object key
         1: .line 482
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode.cache:Lcom/oracle/truffle/polyglot/PolyglotMap$Cache;
            getfield com.oracle.truffle.polyglot.PolyglotMap$Cache.memberKey:Z
            ifeq 4
            aload 4 /* interop */
            aload 2 /* receiver */
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.hasMembers:(Ljava/lang/Object;)Z
            ifeq 4
         2: .line 483
            aload 0 /* this */
            aload 5 /* key */
            invokevirtual com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode.isObjectKey:(Ljava/lang/Object;)Z
            ifeq 7
         3: .line 484
            aload 4 /* interop */
            aload 2 /* receiver */
            aload 5 /* key */
            checkcast java.lang.String
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.isMemberReadable:(Ljava/lang/Object;Ljava/lang/String;)Z
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            areturn
         4: .line 486
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode.cache:Lcom/oracle/truffle/polyglot/PolyglotMap$Cache;
            getfield com.oracle.truffle.polyglot.PolyglotMap$Cache.numberKey:Z
            ifeq 7
            aload 4 /* interop */
            aload 2 /* receiver */
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.hasArrayElements:(Ljava/lang/Object;)Z
            ifeq 7
         5: .line 487
            aload 0 /* this */
            aload 5 /* key */
            invokevirtual com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode.isArrayKey:(Ljava/lang/Object;)Z
            ifeq 7
         6: .line 488
            aload 4 /* interop */
            aload 2 /* receiver */
            aload 5 /* key */
            invokestatic com.oracle.truffle.polyglot.PolyglotMap.intValue:(Ljava/lang/Object;)I
            i2l
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.isArrayElementReadable:(Ljava/lang/Object;J)Z
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            areturn
         7: .line 491
      StackMap locals:
      StackMap stack:
            iconst_0
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            areturn
        end local 5 // java.lang.Object key
        end local 4 // com.oracle.truffle.api.interop.InteropLibrary interop
        end local 3 // java.lang.Object[] args
        end local 2 // java.lang.Object receiver
        end local 1 // com.oracle.truffle.polyglot.PolyglotLanguageContext languageContext
        end local 0 // com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    8     0             this  Lcom/oracle/truffle/polyglot/PolyglotMap$Cache$ContainsKeyNode;
            0    8     1  languageContext  Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;
            0    8     2         receiver  Ljava/lang/Object;
            0    8     3             args  [Ljava/lang/Object;
            0    8     4          interop  Lcom/oracle/truffle/api/interop/InteropLibrary;
            1    8     5              key  Ljava/lang/Object;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(limit = "LIMIT")
    RuntimeInvisibleParameterAnnotations: 
      0:
      1:
      2:
      3:
        com.oracle.truffle.api.library.CachedLibrary(value = "receiver")
    MethodParameters:
                 Name  Flags
      languageContext  
      receiver         
      args             
      interop          

  protected java.lang.String getOperationName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode this
         0: .line 496
            ldc "containsKey"
            areturn
        end local 0 // com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/PolyglotMap$Cache$ContainsKeyNode;
}
SourceFile: "PolyglotMap.java"
NestHost: com.oracle.truffle.polyglot.PolyglotMap
InnerClasses:
  final Cache = com.oracle.truffle.polyglot.PolyglotMap$Cache of com.oracle.truffle.polyglot.PolyglotMap
  abstract ContainsKeyNode = com.oracle.truffle.polyglot.PolyglotMap$Cache$ContainsKeyNode of com.oracle.truffle.polyglot.PolyglotMap$Cache
  abstract PolyglotMapNode = com.oracle.truffle.polyglot.PolyglotMap$Cache$PolyglotMapNode of com.oracle.truffle.polyglot.PolyglotMap$Cache