https://www.graalvm.org/ 
class com.oracle.truffle.tck.tests.TestContext$3 implements java.util.function.Function<org.graalvm.polyglot.tck.LanguageProvider, java.util.Collection<? extends org.graalvm.polyglot.tck.Snippet>>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.tck.tests.TestContext$3
  super_class: java.lang.Object
{
  final com.oracle.truffle.tck.tests.TestContext this$0;
    descriptor: Lcom/oracle/truffle/tck/tests/TestContext;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.tck.tests.TestContext);
    descriptor: (Lcom/oracle/truffle/tck/tests/TestContext;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.tck.tests.TestContext$3 this
         0: .line 222
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.tck.tests.TestContext$3.this$0:Lcom/oracle/truffle/tck/tests/TestContext;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.tck.tests.TestContext$3 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/tck/tests/TestContext$3;
    MethodParameters:
        Name  Flags
      this$0  final

  public java.util.Collection<? extends org.graalvm.polyglot.tck.Snippet> apply(org.graalvm.polyglot.tck.LanguageProvider);
    descriptor: (Lorg/graalvm/polyglot/tck/LanguageProvider;)Ljava/util/Collection;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.tck.tests.TestContext$3 this
        start local 1 // org.graalvm.polyglot.tck.LanguageProvider tli
         0: .line 225
            aload 1 /* tli */
            aload 0 /* this */
            getfield com.oracle.truffle.tck.tests.TestContext$3.this$0:Lcom/oracle/truffle/tck/tests/TestContext;
            getfield com.oracle.truffle.tck.tests.TestContext.context:Lorg/graalvm/polyglot/Context;
            invokeinterface org.graalvm.polyglot.tck.LanguageProvider.createScripts:(Lorg/graalvm/polyglot/Context;)Ljava/util/Collection;
            areturn
        end local 1 // org.graalvm.polyglot.tck.LanguageProvider tli
        end local 0 // com.oracle.truffle.tck.tests.TestContext$3 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/tck/tests/TestContext$3;
            0    1     1   tli  Lorg/graalvm/polyglot/tck/LanguageProvider;
    Signature: (Lorg/graalvm/polyglot/tck/LanguageProvider;)Ljava/util/Collection<+Lorg/graalvm/polyglot/tck/Snippet;>;
    MethodParameters:
      Name  Flags
      tli   

  public java.lang.Object apply(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast org.graalvm.polyglot.tck.LanguageProvider
            invokevirtual com.oracle.truffle.tck.tests.TestContext$3.apply:(Lorg/graalvm/polyglot/tck/LanguageProvider;)Ljava/util/Collection;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/Function<Lorg/graalvm/polyglot/tck/LanguageProvider;Ljava/util/Collection<+Lorg/graalvm/polyglot/tck/Snippet;>;>;
SourceFile: "TestContext.java"
EnclosingMethod: com.oracle.truffle.tck.tests.TestContext.getScripts:(Lorg/graalvm/polyglot/tck/TypeDescriptor;[Ljava/lang/String;)Ljava/util/Collection;
NestHost: com.oracle.truffle.tck.tests.TestContext
InnerClasses:
  com.oracle.truffle.tck.tests.TestContext$3