src/main/java/com/infilos/DAGraph.java
/**
     * if tho node does not exist,add this node
     *
     * @param node     node
     * @param nodeInfo node meta info
     */
if tho node does not exist,add this node
@param node     node
@param nodeInfo node meta info
if tho node does not exist add this node @param node node @param nodeInfo node meta info
private void addNodeIfAbsent(Node node, NodeMeta nodeInfo) {
        if (!containsNode(node)) {
            addNode(node, nodeInfo);
        }
    }
private void addNodeIfAbsent ( Node node , NodeMeta nodeInfo ) { if ( ! containsNode ( node ) ) { addNode ( node , nodeInfo ) ; } }
if tho node does not exist,add this node
 @param node     node
 @param nodeInfo node meta info
if tho node does not exist add this node @param node node @param nodeInfo node meta info