https://www.graalvm.org/ 
abstract class com.oracle.truffle.polyglot.TargetMappingNode extends com.oracle.truffle.api.nodes.Node
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.polyglot.TargetMappingNode
  super_class: com.oracle.truffle.api.nodes.Node
{
  public static final java.lang.Object NO_RESULT;
    descriptor: Ljava/lang/Object;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  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=2, locals=0, args_size=0
         0: .line 58
            ldc Lcom/oracle/truffle/polyglot/TargetMappingNode;
            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.TargetMappingNode.$assertionsDisabled:Z
         3: .line 60
            new java.lang.Object
            dup
            invokespecial java.lang.Object.<init>:()V
            putstatic com.oracle.truffle.polyglot.TargetMappingNode.NO_RESULT:Ljava/lang/Object;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.polyglot.TargetMappingNode this
         0: .line 58
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.nodes.Node.<init>:()V
            return
        end local 0 // com.oracle.truffle.polyglot.TargetMappingNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/TargetMappingNode;

  abstract  execute(, java.lang.Class<?>, com.oracle.truffle.polyglot.PolyglotLanguageContext, com.oracle.truffle.api.interop.InteropLibrary, boolean, int, int);
    descriptor: (Ljava/lang/Object;Ljava/lang/Class;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Lcom/oracle/truffle/api/interop/InteropLibrary;ZII)Ljava/lang/Object;
    flags: (0x0400) ACC_ABSTRACT
    Signature: (Ljava/lang/Object;Ljava/lang/Class<*>;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Lcom/oracle/truffle/api/interop/InteropLibrary;ZII)Ljava/lang/Object;
    MethodParameters:
                 Name  Flags
      value            
      targetType       
      languageContext  
      interop          
      checkOnly        
      startPriority    
      endPriority      

  protected  doCached(, java.lang.Class<?>, com.oracle.truffle.polyglot.PolyglotLanguageContext, com.oracle.truffle.api.interop.InteropLibrary, boolean, int, int, com.oracle.truffle.polyglot.PolyglotTargetMapping[], com.oracle.truffle.polyglot.TargetMappingNode$SingleMappingNode[]);
    descriptor: (Ljava/lang/Object;Ljava/lang/Class;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Lcom/oracle/truffle/api/interop/InteropLibrary;ZII[Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;[Lcom/oracle/truffle/polyglot/TargetMappingNode$SingleMappingNode;)Ljava/lang/Object;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=6, locals=13, args_size=10
        start local 0 // com.oracle.truffle.polyglot.TargetMappingNode this
        start local 1 // java.lang.Object operand
        start local 2 // java.lang.Class targetType
        start local 3 // com.oracle.truffle.polyglot.PolyglotLanguageContext context
        start local 4 // com.oracle.truffle.api.interop.InteropLibrary interop
        start local 5 // boolean checkOnly
        start local 6 // int startPriority
        start local 7 // int endPriority
        start local 8 // com.oracle.truffle.polyglot.PolyglotTargetMapping[] mappings
        start local 9 // com.oracle.truffle.polyglot.TargetMappingNode$SingleMappingNode[] mappingNodes
         0: .line 70
            getstatic com.oracle.truffle.polyglot.TargetMappingNode.$assertionsDisabled:Z
            ifne 1
            iload 6 /* startPriority */
            iload 7 /* endPriority */
            if_icmple 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 71
      StackMap locals:
      StackMap stack:
            getstatic com.oracle.truffle.polyglot.TargetMappingNode.NO_RESULT:Ljava/lang/Object;
            astore 10 /* result */
        start local 10 // java.lang.Object result
         2: .line 72
            aload 9 /* mappingNodes */
            ifnull 15
         3: .line 73
            iconst_0
            istore 11 /* i */
        start local 11 // int i
         4: goto 14
         5: .line 74
      StackMap locals: java.lang.Object int
      StackMap stack:
            aload 8 /* mappings */
            iload 11 /* i */
            aaload
            astore 12 /* mapping */
        start local 12 // com.oracle.truffle.polyglot.PolyglotTargetMapping mapping
         6: .line 75
            aload 12 /* mapping */
            getfield com.oracle.truffle.polyglot.PolyglotTargetMapping.hostPriority:I
            iload 6 /* startPriority */
            if_icmpge 8
         7: .line 76
            goto 13
         8: .line 77
      StackMap locals: com.oracle.truffle.polyglot.PolyglotTargetMapping
      StackMap stack:
            aload 12 /* mapping */
            getfield com.oracle.truffle.polyglot.PolyglotTargetMapping.hostPriority:I
            iload 7 /* endPriority */
            if_icmple 10
         9: .line 78
            goto 15
        10: .line 80
      StackMap locals:
      StackMap stack:
            aload 9 /* mappingNodes */
            iload 11 /* i */
            aaload
            aload 1 /* operand */
            aload 8 /* mappings */
            iload 11 /* i */
            aaload
            aload 3 /* context */
            aload 4 /* interop */
            iload 5 /* checkOnly */
            invokevirtual com.oracle.truffle.polyglot.TargetMappingNode$SingleMappingNode.execute:(Ljava/lang/Object;Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Lcom/oracle/truffle/api/interop/InteropLibrary;Z)Ljava/lang/Object;
            astore 10 /* result */
        11: .line 81
            aload 10 /* result */
            getstatic com.oracle.truffle.polyglot.TargetMappingNode.NO_RESULT:Ljava/lang/Object;
            if_acmpeq 13
        12: .line 82
            goto 15
        end local 12 // com.oracle.truffle.polyglot.PolyglotTargetMapping mapping
        13: .line 73
      StackMap locals:
      StackMap stack:
            iinc 11 /* i */ 1
      StackMap locals:
      StackMap stack:
        14: iload 11 /* i */
            aload 9 /* mappingNodes */
            arraylength
            if_icmplt 5
        end local 11 // int i
        15: .line 86
      StackMap locals:
      StackMap stack:
            aload 10 /* result */
            areturn
        end local 10 // java.lang.Object result
        end local 9 // com.oracle.truffle.polyglot.TargetMappingNode$SingleMappingNode[] mappingNodes
        end local 8 // com.oracle.truffle.polyglot.PolyglotTargetMapping[] mappings
        end local 7 // int endPriority
        end local 6 // int startPriority
        end local 5 // boolean checkOnly
        end local 4 // com.oracle.truffle.api.interop.InteropLibrary interop
        end local 3 // com.oracle.truffle.polyglot.PolyglotLanguageContext context
        end local 2 // java.lang.Class targetType
        end local 1 // java.lang.Object operand
        end local 0 // com.oracle.truffle.polyglot.TargetMappingNode this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   16     0           this  Lcom/oracle/truffle/polyglot/TargetMappingNode;
            0   16     1        operand  Ljava/lang/Object;
            0   16     2     targetType  Ljava/lang/Class<*>;
            0   16     3        context  Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;
            0   16     4        interop  Lcom/oracle/truffle/api/interop/InteropLibrary;
            0   16     5      checkOnly  Z
            0   16     6  startPriority  I
            0   16     7    endPriority  I
            0   16     8       mappings  [Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
            0   16     9   mappingNodes  [Lcom/oracle/truffle/polyglot/TargetMappingNode$SingleMappingNode;
            2   16    10         result  Ljava/lang/Object;
            4   15    11              i  I
            6   13    12        mapping  Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
    Signature: (Ljava/lang/Object;Ljava/lang/Class<*>;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Lcom/oracle/truffle/api/interop/InteropLibrary;ZII[Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;[Lcom/oracle/truffle/polyglot/TargetMappingNode$SingleMappingNode;)Ljava/lang/Object;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"targetType != null"})
      com.oracle.truffle.api.nodes.ExplodeLoop()
    RuntimeInvisibleParameterAnnotations: 
      0:
      1:
      2:
      3:
      4:
      5:
      6:
      7:
        com.oracle.truffle.api.dsl.Cached(value = "getMappings(context, targetType)", dimensions = 1)
      8:
        com.oracle.truffle.api.dsl.Cached(value = "createMappingNodes(mappings)")
    MethodParameters:
               Name  Flags
      operand        
      targetType     
      context        
      interop        
      checkOnly      
      startPriority  
      endPriority    
      mappings       
      mappingNodes   

  protected  doUncached(, java.lang.Class<?>, com.oracle.truffle.polyglot.PolyglotLanguageContext, com.oracle.truffle.api.interop.InteropLibrary, boolean, int, int);
    descriptor: (Ljava/lang/Object;Ljava/lang/Class;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Lcom/oracle/truffle/api/interop/InteropLibrary;ZII)Ljava/lang/Object;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=8, args_size=8
        start local 0 // com.oracle.truffle.polyglot.TargetMappingNode this
         0: .line 97
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tSingleMappingNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // com.oracle.truffle.polyglot.TargetMappingNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/TargetMappingNode;
    Signature: (Ljava/lang/Object;Ljava/lang/Class<*>;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Lcom/oracle/truffle/api/interop/InteropLibrary;ZII)Ljava/lang/Object;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(replaces = {"doCached"})
      com.oracle.truffle.api.CompilerDirectives$TruffleBoundary()
    MethodParameters:
               Name  Flags
      operand        
      targetType     
      context        
      interop        
      checkOnly      
      startPriority  
      endPriority    

  static com.oracle.truffle.polyglot.PolyglotTargetMapping[] getMappings(com.oracle.truffle.polyglot.PolyglotLanguageContext, java.lang.Class<?>);
    descriptor: (Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Ljava/lang/Class;)[Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.polyglot.PolyglotLanguageContext context
        start local 1 // java.lang.Class targetType
         0: .line 116
            aload 0 /* context */
            ifnonnull 2
         1: .line 117
            getstatic com.oracle.truffle.polyglot.HostClassCache.EMPTY_MAPPINGS:[Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
            areturn
         2: .line 119
      StackMap locals:
      StackMap stack:
            aload 0 /* context */
            invokevirtual com.oracle.truffle.polyglot.PolyglotLanguageContext.getEngine:()Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            invokevirtual com.oracle.truffle.polyglot.PolyglotEngineImpl.getHostClassCache:()Lcom/oracle/truffle/polyglot/HostClassCache;
            aload 1 /* targetType */
            invokevirtual com.oracle.truffle.polyglot.HostClassCache.getMappings:(Ljava/lang/Class;)[Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
            areturn
        end local 1 // java.lang.Class targetType
        end local 0 // com.oracle.truffle.polyglot.PolyglotLanguageContext context
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    3     0     context  Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;
            0    3     1  targetType  Ljava/lang/Class<*>;
    Signature: (Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;Ljava/lang/Class<*>;)[Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.CompilerDirectives$TruffleBoundary()
    MethodParameters:
            Name  Flags
      context     
      targetType  

  static com.oracle.truffle.polyglot.TargetMappingNode$SingleMappingNode[] createMappingNodes(com.oracle.truffle.polyglot.PolyglotTargetMapping[]);
    descriptor: ([Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;)[Lcom/oracle/truffle/polyglot/TargetMappingNode$SingleMappingNode;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
         0: .line 129
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tSingleMappingNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.CompilerDirectives$TruffleBoundary()
    MethodParameters:
          Name  Flags
      mappings  

  static com.oracle.truffle.polyglot.TargetMappingNode create();
    descriptor: ()Lcom/oracle/truffle/polyglot/TargetMappingNode;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 135
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tTargetMappingNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  static com.oracle.truffle.polyglot.TargetMappingNode getUncached();
    descriptor: ()Lcom/oracle/truffle/polyglot/TargetMappingNode;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 139
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tTargetMappingNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "TargetMappingNode.java"
NestMembers:
  com.oracle.truffle.polyglot.TargetMappingNode$SingleMappingNode
InnerClasses:
  public abstract TruffleBoundary = com.oracle.truffle.api.CompilerDirectives$TruffleBoundary of com.oracle.truffle.api.CompilerDirectives
  abstract SingleMappingNode = com.oracle.truffle.polyglot.TargetMappingNode$SingleMappingNode of com.oracle.truffle.polyglot.TargetMappingNode
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.dsl.GenerateUncached()