https://projects.eclipse.org/projects/ee4j.grizzly/grizzly-websockets-server: Grizzly Bill of Materials (BOM) (Oracle Corporation) 
public interface org.glassfish.grizzly.nio.SelectorHandlerTask
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.glassfish.grizzly.nio.SelectorHandlerTask
  super_class: java.lang.Object
{
  public abstract boolean run(org.glassfish.grizzly.nio.SelectorRunner);
    descriptor: (Lorg/glassfish/grizzly/nio/SelectorRunner;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.io.IOException
    MethodParameters:
                Name  Flags
      selectorRunner  

  public abstract void cancel();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "SelectorHandlerTask.java"