Method isRed

src/java/org/apache/poi/util/BinaryTree.java:598–601

is the specified node red? if the node does not exist, no, it's black, thank you @param node the node (may be null) in question @param index _KEY or _VALUE

(Node node, int index)

     * @param index _KEY or _VALUE
     */
    private static boolean isRed(Node node, int index)
    {
        return node == null ? false : node.isRed(index);
    }

    /**
     * is the specified black red? if the node does not exist, sure,