Method copyColor

src/java/org/apache/poi/util/BinaryTree.java:2025–2028

make this node the same color as another @param node the node whose color we're adopting @param index _KEY or _VALUE

(Node node, int index)

         * @param index _KEY or _VALUE
         */
        public void copyColor(Node node, int index)
        {
            _black[ index ] = node._black[ index ];
        }

        /* ********** START implementation of Map.Entry ********** */