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								<?php
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								/**
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								 *  PHPExcel_Writer_IWriter
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								 *
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								 *  Copyright (c) 2006 - 2015 PHPExcel
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								 *
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								 *  This library is free software; you can redistribute it and/or
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								 *  modify it under the terms of the GNU Lesser General Public
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								 *  License as published by the Free Software Foundation; either
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								 *  version 2.1 of the License, or (at your option) any later version.
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								 *
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								 *  This library is distributed in the hope that it will be useful,
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								 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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								 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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								 *  Lesser General Public License for more details.
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								 *
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								 *  You should have received a copy of the GNU Lesser General Public
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								 *  License along with this library; if not, write to the Free Software
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								 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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								 *
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								 *  @category   PHPExcel
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								 *  @package    PHPExcel_Writer
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								 *  @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
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								 *  @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
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								 *  @version    ##VERSION##, ##DATE##
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								 */
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								interface PHPExcel_Writer_IWriter
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								{
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								    /**
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								     *  Save PHPExcel to file
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								     *
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								     *  @param   string       $pFilename  Name of the file to save
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								     *  @throws  PHPExcel_Writer_Exception
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								     */
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								    public function save($pFilename = null);
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								}
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