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    1   // Copyright 2006, 2007 The Apache Software Foundation
    2   //
    3   // Licensed under the Apache License, Version 2.0 (the "License");
    4   // you may not use this file except in compliance with the License.
    5   // You may obtain a copy of the License at
    6   //
    7   //     http://www.apache.org/licenses/LICENSE-2.0
    8   //
    9   // Unless required by applicable law or agreed to in writing, software
   10   // distributed under the License is distributed on an "AS IS" BASIS,
   11   // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   12   // See the License for the specific language governing permissions and
   13   // limitations under the License.
   14   
   15   package org.apache.tapestry5.internal.events;
   16   
   17   /**
   18    * Interface for objects which can periodically check for updates.
   19    */
   20   public interface UpdateListener
   21   {
   22       /**
   23        * Invoked to force the receiver to check for updates to whatever underlying resources it makes use of.
   24        */
   25       void checkForUpdates();
   26   }

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