https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
class com.google.common.util.concurrent.Callables$2 implements com.google.common.util.concurrent.AsyncCallable<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.util.concurrent.Callables$2
  super_class: java.lang.Object
{
  private final com.google.common.util.concurrent.ListeningExecutorService val$listeningExecutorService;
    descriptor: Lcom/google/common/util/concurrent/ListeningExecutorService;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  private final java.util.concurrent.Callable val$callable;
    descriptor: Ljava/util/concurrent/Callable;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.google.common.util.concurrent.ListeningExecutorService, java.util.concurrent.Callable);
    descriptor: (Lcom/google/common/util/concurrent/ListeningExecutorService;Ljava/util/concurrent/Callable;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.google.common.util.concurrent.Callables$2 this
         0: .line 60
            aload 0 /* this */
            aload 1
            putfield com.google.common.util.concurrent.Callables$2.val$listeningExecutorService:Lcom/google/common/util/concurrent/ListeningExecutorService;
            aload 0 /* this */
            aload 2
            putfield com.google.common.util.concurrent.Callables$2.val$callable:Ljava/util/concurrent/Callable;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.google.common.util.concurrent.Callables$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/util/concurrent/Callables$2;
    MethodParameters:
                              Name  Flags
      val$listeningExecutorService  final
      val$callable                  final

  public com.google.common.util.concurrent.ListenableFuture<T> call();
    descriptor: ()Lcom/google/common/util/concurrent/ListenableFuture;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.Callables$2 this
         0: .line 63
            aload 0 /* this */
            getfield com.google.common.util.concurrent.Callables$2.val$listeningExecutorService:Lcom/google/common/util/concurrent/ListeningExecutorService;
            aload 0 /* this */
            getfield com.google.common.util.concurrent.Callables$2.val$callable:Ljava/util/concurrent/Callable;
            invokeinterface com.google.common.util.concurrent.ListeningExecutorService.submit:(Ljava/util/concurrent/Callable;)Lcom/google/common/util/concurrent/ListenableFuture;
            areturn
        end local 0 // com.google.common.util.concurrent.Callables$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/util/concurrent/Callables$2;
    Exceptions:
      throws java.lang.Exception
    Signature: ()Lcom/google/common/util/concurrent/ListenableFuture<TT;>;
}
Signature: Ljava/lang/Object;Lcom/google/common/util/concurrent/AsyncCallable<TT;>;
SourceFile: "Callables.java"
EnclosingMethod: com.google.common.util.concurrent.Callables.asAsyncCallable:(Ljava/util/concurrent/Callable;Lcom/google/common/util/concurrent/ListeningExecutorService;)Lcom/google/common/util/concurrent/AsyncCallable;
NestHost: com.google.common.util.concurrent.Callables
InnerClasses:
  com.google.common.util.concurrent.Callables$2