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. 
final class com.google.common.util.concurrent.AbstractIdleService$DelegateService extends com.google.common.util.concurrent.AbstractService
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.util.concurrent.AbstractIdleService$DelegateService
  super_class: com.google.common.util.concurrent.AbstractService
{
  final com.google.common.util.concurrent.AbstractIdleService this$0;
    descriptor: Lcom/google/common/util/concurrent/AbstractIdleService;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private void <init>(com.google.common.util.concurrent.AbstractIdleService);
    descriptor: (Lcom/google/common/util/concurrent/AbstractIdleService;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.util.concurrent.AbstractIdleService$DelegateService this
         0: .line 53
            aload 0 /* this */
            aload 1
            putfield com.google.common.util.concurrent.AbstractIdleService$DelegateService.this$0:Lcom/google/common/util/concurrent/AbstractIdleService;
            aload 0 /* this */
            invokespecial com.google.common.util.concurrent.AbstractService.<init>:()V
            return
        end local 0 // com.google.common.util.concurrent.AbstractIdleService$DelegateService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/util/concurrent/AbstractIdleService$DelegateService;
    MethodParameters:
        Name  Flags
      this$0  final

  protected final void doStart();
    descriptor: ()V
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.AbstractIdleService$DelegateService this
         0: .line 56
            aload 0 /* this */
            getfield com.google.common.util.concurrent.AbstractIdleService$DelegateService.this$0:Lcom/google/common/util/concurrent/AbstractIdleService;
            invokevirtual com.google.common.util.concurrent.AbstractIdleService.executor:()Ljava/util/concurrent/Executor;
            aload 0 /* this */
            getfield com.google.common.util.concurrent.AbstractIdleService$DelegateService.this$0:Lcom/google/common/util/concurrent/AbstractIdleService;
            getfield com.google.common.util.concurrent.AbstractIdleService.threadNameSupplier:Lcom/google/common/base/Supplier;
            invokestatic com.google.common.util.concurrent.MoreExecutors.renamingDecorator:(Ljava/util/concurrent/Executor;Lcom/google/common/base/Supplier;)Ljava/util/concurrent/Executor;
         1: .line 58
            new com.google.common.util.concurrent.AbstractIdleService$DelegateService$1
            dup
            aload 0 /* this */
            invokespecial com.google.common.util.concurrent.AbstractIdleService$DelegateService$1.<init>:(Lcom/google/common/util/concurrent/AbstractIdleService$DelegateService;)V
         2: .line 57
            invokeinterface java.util.concurrent.Executor.execute:(Ljava/lang/Runnable;)V
         3: .line 69
            return
        end local 0 // com.google.common.util.concurrent.AbstractIdleService$DelegateService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/google/common/util/concurrent/AbstractIdleService$DelegateService;

  protected final void doStop();
    descriptor: ()V
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.AbstractIdleService$DelegateService this
         0: .line 73
            aload 0 /* this */
            getfield com.google.common.util.concurrent.AbstractIdleService$DelegateService.this$0:Lcom/google/common/util/concurrent/AbstractIdleService;
            invokevirtual com.google.common.util.concurrent.AbstractIdleService.executor:()Ljava/util/concurrent/Executor;
            aload 0 /* this */
            getfield com.google.common.util.concurrent.AbstractIdleService$DelegateService.this$0:Lcom/google/common/util/concurrent/AbstractIdleService;
            getfield com.google.common.util.concurrent.AbstractIdleService.threadNameSupplier:Lcom/google/common/base/Supplier;
            invokestatic com.google.common.util.concurrent.MoreExecutors.renamingDecorator:(Ljava/util/concurrent/Executor;Lcom/google/common/base/Supplier;)Ljava/util/concurrent/Executor;
         1: .line 75
            new com.google.common.util.concurrent.AbstractIdleService$DelegateService$2
            dup
            aload 0 /* this */
            invokespecial com.google.common.util.concurrent.AbstractIdleService$DelegateService$2.<init>:(Lcom/google/common/util/concurrent/AbstractIdleService$DelegateService;)V
         2: .line 74
            invokeinterface java.util.concurrent.Executor.execute:(Ljava/lang/Runnable;)V
         3: .line 86
            return
        end local 0 // com.google.common.util.concurrent.AbstractIdleService$DelegateService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/google/common/util/concurrent/AbstractIdleService$DelegateService;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.AbstractIdleService$DelegateService this
         0: .line 90
            aload 0 /* this */
            getfield com.google.common.util.concurrent.AbstractIdleService$DelegateService.this$0:Lcom/google/common/util/concurrent/AbstractIdleService;
            invokevirtual com.google.common.util.concurrent.AbstractIdleService.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.google.common.util.concurrent.AbstractIdleService$DelegateService this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/util/concurrent/AbstractIdleService$DelegateService;

  static com.google.common.util.concurrent.AbstractIdleService access$0(com.google.common.util.concurrent.AbstractIdleService$DelegateService);
    descriptor: (Lcom/google/common/util/concurrent/AbstractIdleService$DelegateService;)Lcom/google/common/util/concurrent/AbstractIdleService;
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 53
            aload 0
            getfield com.google.common.util.concurrent.AbstractIdleService$DelegateService.this$0:Lcom/google/common/util/concurrent/AbstractIdleService;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "AbstractIdleService.java"
NestHost: com.google.common.util.concurrent.AbstractIdleService
InnerClasses:
  private final DelegateService = com.google.common.util.concurrent.AbstractIdleService$DelegateService of com.google.common.util.concurrent.AbstractIdleService
  com.google.common.util.concurrent.AbstractIdleService$DelegateService$1
  com.google.common.util.concurrent.AbstractIdleService$DelegateService$2