https://www.graalvm.org/ 
final class com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate implements java.util.function.Predicate<java.util.Map$Entry<java.lang.String, ? extends org.graalvm.polyglot.tck.LanguageProvider>>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate
  super_class: java.lang.Object
{
  private static final java.util.function.Predicate<java.util.Map$Entry<java.lang.String, ? extends org.graalvm.polyglot.tck.LanguageProvider>> TRUE;
    descriptor: Ljava/util/function/Predicate;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    Signature: Ljava/util/function/Predicate<Ljava/util/Map$Entry<Ljava/lang/String;+Lorg/graalvm/polyglot/tck/LanguageProvider;>;>;

  private final java.util.Set<java.lang.String> requiredIds;
    descriptor: Ljava/util/Set;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/Set<Ljava/lang/String;>;

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 316
            new com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate$1
            dup
            invokespecial com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate$1.<init>:()V
            putstatic com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate.TRUE:Ljava/util/function/Predicate;
         1: .line 321
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>(java.lang.String[]);
    descriptor: ([Ljava/lang/String;)V
    flags: (0x0082) ACC_PRIVATE, ACC_VARARGS
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate this
        start local 1 // java.lang.String[] ids
         0: .line 324
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 325
            aload 0 /* this */
            new java.util.HashSet
            dup
            invokespecial java.util.HashSet.<init>:()V
            putfield com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate.requiredIds:Ljava/util/Set;
         2: .line 326
            aload 0 /* this */
            getfield com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate.requiredIds:Ljava/util/Set;
            aload 1 /* ids */
            invokestatic java.util.Collections.addAll:(Ljava/util/Collection;[Ljava/lang/Object;)Z
            pop
         3: .line 327
            return
        end local 1 // java.lang.String[] ids
        end local 0 // com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/oracle/truffle/tck/tests/TestContext$LanguageIdPredicate;
            0    4     1   ids  [Ljava/lang/String;
    MethodParameters:
      Name  Flags
      ids   final

  public boolean test(java.util.Map$Entry<java.lang.String, ? extends org.graalvm.polyglot.tck.LanguageProvider>);
    descriptor: (Ljava/util/Map$Entry;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate this
        start local 1 // java.util.Map$Entry e
         0: .line 331
            aload 0 /* this */
            getfield com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate.requiredIds:Ljava/util/Set;
            aload 1 /* e */
            invokeinterface java.util.Map$Entry.getKey:()Ljava/lang/Object;
            invokeinterface java.util.Set.contains:(Ljava/lang/Object;)Z
            ireturn
        end local 1 // java.util.Map$Entry e
        end local 0 // com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/tck/tests/TestContext$LanguageIdPredicate;
            0    1     1     e  Ljava/util/Map$Entry<Ljava/lang/String;+Lorg/graalvm/polyglot/tck/LanguageProvider;>;
    Signature: (Ljava/util/Map$Entry<Ljava/lang/String;+Lorg/graalvm/polyglot/tck/LanguageProvider;>;)Z
    MethodParameters:
      Name  Flags
      e     

  static java.util.function.Predicate<java.util.Map$Entry<java.lang.String, ? extends org.graalvm.polyglot.tck.LanguageProvider>> create(java.lang.String[]);
    descriptor: ([Ljava/lang/String;)Ljava/util/function/Predicate;
    flags: (0x0088) ACC_STATIC, ACC_VARARGS
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // java.lang.String[] ids
         0: .line 335
            aload 0 /* ids */
            arraylength
            ifne 1
            getstatic com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate.TRUE:Ljava/util/function/Predicate;
            goto 2
      StackMap locals:
      StackMap stack:
         1: new com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate
            dup
            aload 0 /* ids */
            invokespecial com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate.<init>:([Ljava/lang/String;)V
      StackMap locals:
      StackMap stack: java.util.function.Predicate
         2: areturn
        end local 0 // java.lang.String[] ids
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0   ids  [Ljava/lang/String;
    Signature: ([Ljava/lang/String;)Ljava/util/function/Predicate<Ljava/util/Map$Entry<Ljava/lang/String;+Lorg/graalvm/polyglot/tck/LanguageProvider;>;>;
    MethodParameters:
      Name  Flags
      ids   

  public boolean test(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.util.Map$Entry
            invokevirtual com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate.test:(Ljava/util/Map$Entry;)Z
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/Predicate<Ljava/util/Map$Entry<Ljava/lang/String;+Lorg/graalvm/polyglot/tck/LanguageProvider;>;>;
SourceFile: "TestContext.java"
NestHost: com.oracle.truffle.tck.tests.TestContext
InnerClasses:
  private final LanguageIdPredicate = com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate of com.oracle.truffle.tck.tests.TestContext
  com.oracle.truffle.tck.tests.TestContext$LanguageIdPredicate$1
  public abstract Entry = java.util.Map$Entry of java.util.Map