https://www.graalvm.org/ 
final class com.oracle.truffle.polyglot.PolyglotTargetMapping implements java.lang.Comparable<com.oracle.truffle.polyglot.PolyglotTargetMapping>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.polyglot.PolyglotTargetMapping
  super_class: java.lang.Object
{
  final java.lang.Class<java.lang.Object> sourceType;
    descriptor: Ljava/lang/Class;
    flags: (0x0010) ACC_FINAL
    Signature: Ljava/lang/Class<Ljava/lang/Object;>;

  final java.lang.Class<java.lang.Object> targetType;
    descriptor: Ljava/lang/Class;
    flags: (0x0010) ACC_FINAL
    Signature: Ljava/lang/Class<Ljava/lang/Object;>;

  final java.util.function.Predicate<java.lang.Object> accepts;
    descriptor: Ljava/util/function/Predicate;
    flags: (0x0010) ACC_FINAL
    Signature: Ljava/util/function/Predicate<Ljava/lang/Object;>;

  final java.util.function.Function<java.lang.Object, java.lang.Object> converter;
    descriptor: Ljava/util/function/Function;
    flags: (0x0010) ACC_FINAL
    Signature: Ljava/util/function/Function<Ljava/lang/Object;Ljava/lang/Object;>;

  final int hostPriority;
    descriptor: I
    flags: (0x0010) ACC_FINAL

  private static volatile int[] $SWITCH_TABLE$org$graalvm$polyglot$HostAccess$TargetMappingPrecedence;
    descriptor: [I
    flags: (0x104a) ACC_PRIVATE, ACC_STATIC, ACC_VOLATILE, ACC_SYNTHETIC

  <S, T> void <init>(java.lang.Class<S>, java.lang.Class<T>, java.util.function.Predicate<S>, java.util.function.Function<S, T>, org.graalvm.polyglot.HostAccess$TargetMappingPrecedence);
    descriptor: (Ljava/lang/Class;Ljava/lang/Class;Ljava/util/function/Predicate;Ljava/util/function/Function;Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=6, args_size=6
        start local 0 // com.oracle.truffle.polyglot.PolyglotTargetMapping this
        start local 1 // java.lang.Class sourceType
        start local 2 // java.lang.Class targetType
        start local 3 // java.util.function.Predicate accepts
        start local 4 // java.util.function.Function converter
        start local 5 // org.graalvm.polyglot.HostAccess$TargetMappingPrecedence precedence
         0: .line 57
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 58
            aload 0 /* this */
            aload 1 /* sourceType */
            putfield com.oracle.truffle.polyglot.PolyglotTargetMapping.sourceType:Ljava/lang/Class;
         2: .line 59
            aload 0 /* this */
            aload 2 /* targetType */
            putfield com.oracle.truffle.polyglot.PolyglotTargetMapping.targetType:Ljava/lang/Class;
         3: .line 60
            aload 0 /* this */
            aload 3 /* accepts */
            putfield com.oracle.truffle.polyglot.PolyglotTargetMapping.accepts:Ljava/util/function/Predicate;
         4: .line 61
            aload 0 /* this */
            aload 4 /* converter */
            putfield com.oracle.truffle.polyglot.PolyglotTargetMapping.converter:Ljava/util/function/Function;
         5: .line 62
            aload 0 /* this */
            aload 5 /* precedence */
            invokestatic com.oracle.truffle.polyglot.PolyglotTargetMapping.toHostPriority:(Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;)I
            putfield com.oracle.truffle.polyglot.PolyglotTargetMapping.hostPriority:I
         6: .line 63
            return
        end local 5 // org.graalvm.polyglot.HostAccess$TargetMappingPrecedence precedence
        end local 4 // java.util.function.Function converter
        end local 3 // java.util.function.Predicate accepts
        end local 2 // java.lang.Class targetType
        end local 1 // java.lang.Class sourceType
        end local 0 // com.oracle.truffle.polyglot.PolyglotTargetMapping this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    7     0        this  Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
            0    7     1  sourceType  Ljava/lang/Class<TS;>;
            0    7     2  targetType  Ljava/lang/Class<TT;>;
            0    7     3     accepts  Ljava/util/function/Predicate<TS;>;
            0    7     4   converter  Ljava/util/function/Function<TS;TT;>;
            0    7     5  precedence  Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;
    Signature: <S:Ljava/lang/Object;T:Ljava/lang/Object;>(Ljava/lang/Class<TS;>;Ljava/lang/Class<TT;>;Ljava/util/function/Predicate<TS;>;Ljava/util/function/Function<TS;TT;>;Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;)V
    MethodParameters:
            Name  Flags
      sourceType  
      targetType  
      accepts     
      converter   
      precedence  

  private static int toHostPriority(org.graalvm.polyglot.HostAccess$TargetMappingPrecedence);
    descriptor: (Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;)I
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.graalvm.polyglot.HostAccess$TargetMappingPrecedence p
         0: .line 66
            invokestatic com.oracle.truffle.polyglot.PolyglotTargetMapping.$SWITCH_TABLE$org$graalvm$polyglot$HostAccess$TargetMappingPrecedence:()[I
            aload 0 /* p */
            invokevirtual org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.ordinal:()I
            iaload
            tableswitch { // 1 - 4
                    1: 1
                    2: 2
                    3: 3
                    4: 4
              default: 5
          }
         1: .line 68
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
         2: .line 70
      StackMap locals:
      StackMap stack:
            iconst_1
            ireturn
         3: .line 72
      StackMap locals:
      StackMap stack:
            iconst_2
            ireturn
         4: .line 74
      StackMap locals:
      StackMap stack:
            bipush 8
            ireturn
         5: .line 76
      StackMap locals:
      StackMap stack:
            new java.lang.AssertionError
            dup
            ldc "invalid precedence"
            invokespecial java.lang.AssertionError.<init>:(Ljava/lang/Object;)V
            athrow
        end local 0 // org.graalvm.polyglot.HostAccess$TargetMappingPrecedence p
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0     p  Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;
    MethodParameters:
      Name  Flags
      p     

  public int compareTo(com.oracle.truffle.polyglot.PolyglotTargetMapping);
    descriptor: (Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.polyglot.PolyglotTargetMapping this
        start local 1 // com.oracle.truffle.polyglot.PolyglotTargetMapping o
         0: .line 81
            aload 0 /* this */
            getfield com.oracle.truffle.polyglot.PolyglotTargetMapping.hostPriority:I
            aload 1 /* o */
            getfield com.oracle.truffle.polyglot.PolyglotTargetMapping.hostPriority:I
            invokestatic java.lang.Integer.compare:(II)I
            ireturn
        end local 1 // com.oracle.truffle.polyglot.PolyglotTargetMapping o
        end local 0 // com.oracle.truffle.polyglot.PolyglotTargetMapping this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
            0    1     1     o  Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;
    MethodParameters:
      Name  Flags
      o     

  public int compareTo(java.lang.Object);
    descriptor: (Ljava/lang/Object;)I
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast com.oracle.truffle.polyglot.PolyglotTargetMapping
            invokevirtual com.oracle.truffle.polyglot.PolyglotTargetMapping.compareTo:(Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;)I
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  static int[] $SWITCH_TABLE$org$graalvm$polyglot$HostAccess$TargetMappingPrecedence();
    descriptor: ()[I
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=3, locals=1, args_size=0
         0: .line 48
            getstatic com.oracle.truffle.polyglot.PolyglotTargetMapping.$SWITCH_TABLE$org$graalvm$polyglot$HostAccess$TargetMappingPrecedence:[I
            dup
            ifnull 1
            areturn
      StackMap locals:
      StackMap stack: int[]
         1: pop
            invokestatic org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.values:()[Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;
            arraylength
            newarray 10
            astore 0
         2: aload 0
            getstatic org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.HIGH:Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;
            invokevirtual org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.ordinal:()I
            iconst_2
            iastore
         3: goto 5
      StackMap locals: int[]
      StackMap stack: java.lang.NoSuchFieldError
         4: pop
      StackMap locals:
      StackMap stack:
         5: aload 0
            getstatic org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.HIGHEST:Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;
            invokevirtual org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.ordinal:()I
            iconst_1
            iastore
         6: goto 8
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
         7: pop
      StackMap locals:
      StackMap stack:
         8: aload 0
            getstatic org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.LOW:Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;
            invokevirtual org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.ordinal:()I
            iconst_3
            iastore
         9: goto 11
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        10: pop
      StackMap locals:
      StackMap stack:
        11: aload 0
            getstatic org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.LOWEST:Lorg/graalvm/polyglot/HostAccess$TargetMappingPrecedence;
            invokevirtual org.graalvm.polyglot.HostAccess$TargetMappingPrecedence.ordinal:()I
            iconst_4
            iastore
        12: goto 14
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        13: pop
      StackMap locals:
      StackMap stack:
        14: aload 0
            dup
            putstatic com.oracle.truffle.polyglot.PolyglotTargetMapping.$SWITCH_TABLE$org$graalvm$polyglot$HostAccess$TargetMappingPrecedence:[I
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
      Exception table:
        from    to  target  type
           2     3       4  Class java.lang.NoSuchFieldError
           5     6       7  Class java.lang.NoSuchFieldError
           8     9      10  Class java.lang.NoSuchFieldError
          11    12      13  Class java.lang.NoSuchFieldError
}
Signature: Ljava/lang/Object;Ljava/lang/Comparable<Lcom/oracle/truffle/polyglot/PolyglotTargetMapping;>;
SourceFile: "PolyglotTargetMapping.java"
InnerClasses:
  public final TargetMappingPrecedence = org.graalvm.polyglot.HostAccess$TargetMappingPrecedence of org.graalvm.polyglot.HostAccess