package com.atlassian.plugin.event.events;
   
   import com.atlassian.plugin.Plugin;
   
   import static com.google.common.base.Preconditions.checkNotNull;
   
   /**
    * Event that indicates a plugin has been upgraded at runtime
    *
   * @since 2.2.0
   */
  public class PluginUpgradedEvent
  {
      private final Plugin plugin;
  
      /**
       * Constructs the event
       * @param plugin The plugin that has been upgraded
       */
      public PluginUpgradedEvent(Plugin plugin)
      {
          this.plugin = checkNotNull(plugin);
      }
  
      /**
       * @return the plugin that has been upgraded
       */
      public Plugin getPlugin()
      {
          return plugin;
      }
  }