package com.atlassian.johnson.event;
   
   import javax.annotation.Nonnull;
   import java.util.EventObject;
   
   import static com.google.common.base.Preconditions.checkNotNull;
   
   /**
    * An {@code EventObject} indicating the provided {@link Event} should be removed from the Johnson event container.
   *
   * @since 2.0
   */
  public class RemoveEvent extends EventObject {
  
      private final Event event;
  
      /**
       * Constructs a new {@code RemoveEvent}, setting its source and the Johnson {@link Event} to be removed.
       *
       * @param o     the event source
       * @param event the event to removed
       */
      public RemoveEvent(@Nonnull Object o, @Nonnull Event event) {
          super(o);
  
          this.event = checkNotNull(event, "event");
      }
  
      /**
       * Retrieves the Johnson {@link Event} to remove from the container.
       *
       * @return the event to remove
       */
      @Nonnull
      public Event getEvent() {
          return event;
      }
  }