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Logic-less and semantic templates with Java

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/**
 * Copyright (c) 2012-2013 Edgar Espina
 *
 * This file is part of Handlebars.java.
 *
 * Licensed 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 com.github.jknack.handlebars.helper;

import java.io.IOException;

import com.github.jknack.handlebars.Helper;
import com.github.jknack.handlebars.Options;

/**
 * You can use the unless helper as the inverse of the if helper. Its block
 * will be rendered if the expression returns a falsy value.
 *
 * @author edgar.espina
 * @since 0.3.0
 */
public class UnlessHelper implements Helper