https://projects.eclipse.org/projects/ee4j.grizzly/grizzly-websockets-server: Grizzly Bill of Materials (BOM) (Oracle Corporation) 
public interface org.glassfish.grizzly.impl.FutureImpl<R> extends org.glassfish.grizzly.GrizzlyFuture<R>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.glassfish.grizzly.impl.FutureImpl
  super_class: java.lang.Object
{
  public abstract R getResult();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()TR;

  public abstract void result();
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TR;)V
    MethodParameters:
        Name  Flags
      result  

  public abstract void failure(java.lang.Throwable);
    descriptor: (Ljava/lang/Throwable;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
         Name  Flags
      failure  
}
Signature: <R:Ljava/lang/Object;>Ljava/lang/Object;Lorg/glassfish/grizzly/GrizzlyFuture<TR;>;
SourceFile: "FutureImpl.java"