Method isRed

src/java/org/apache/poi/util/BinaryTree.java:1994–1997

is this node red? @param index _KEY or _VALUE @return true if non-black

(int index)

         * @return true if non-black
         */
        public boolean isRed(int index)
        {
            return !_black[ index ];
        }

        /**
         * make this node black