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diff --git a/Master/texmf-dist/source/support/arara/src/main/java/com/github/cereda/arara/model/Pair.java b/Master/texmf-dist/source/support/arara/src/main/java/com/github/cereda/arara/model/Pair.java
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+/**
+ * Arara, the cool TeX automation tool
+ * Copyright (c) 2012 -- 2018, Paulo Roberto Massa Cereda
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the project's author nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+ * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.github.cereda.arara.model;
+
+/**
+ * Implements a pair of objects.
+ * @author Paulo Roberto Massa Cereda
+ * @version 4.0
+ * @since 4.0
+ */
+public class Pair<T, V> {
+
+ // first element of the pair
+ private final T firstElement;
+
+ // second element of the pair
+ private final V secondElement;
+
+ /**
+ * Constructor.
+ * @param firstElement The first element.
+ * @param secondElement The second element.
+ */
+ public Pair(T firstElement, V secondElement) {
+ this.firstElement = firstElement;
+ this.secondElement = secondElement;
+ }
+
+ /**
+ * Gets the first element.
+ * @return The first element.
+ */
+ public T getFirstElement() {
+ return firstElement;
+ }
+
+ /**
+ * Gets the second element.
+ * @return The second element.
+ */
+ public V getSecondElement() {
+ return secondElement;
+ }
+
+ /**
+ * A shorter version for getting the first element.
+ * @return The first element.
+ */
+ public T first() {
+ return getFirstElement();
+ }
+
+ /**
+ * A shorter version for getting the second element.
+ * @return The second element.
+ */
+ public V second() {
+ return getSecondElement();
+ }
+
+}