https://eclipse.org/jetty/jetty-util: Utility classes for Jetty (Webtide) 
public interface org.eclipse.jetty.util.component.Graceful$ThrowingRunnable
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.eclipse.jetty.util.component.Graceful$ThrowingRunnable
  super_class: java.lang.Object
{
  public abstract void run();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.lang.Exception
}
SourceFile: "Graceful.java"
NestHost: org.eclipse.jetty.util.component.Graceful
InnerClasses:
  public abstract ThrowingRunnable = org.eclipse.jetty.util.component.Graceful$ThrowingRunnable of org.eclipse.jetty.util.component.Graceful
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()