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Apache POI - Java API To Access Microsoft Format Files

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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.apache.poi.ss.formula.eval;

/**
 * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
 *  
 */
public interface StringValueEval extends ValueEval {

    /**
     * @return never null, possibly empty string.
     */
    String getStringValue();
}