void (DirectNode node, DirectGraph dgraph) { SFormsFastMapDirect mapNew = new SFormsFastMapDirect(); for (DirectNode pred : node.predecessors) { SFormsFastMapDirect mapOut = getFilteredOutMap(node.id, pred.id, dgraph, node.id); if (mapNew.isEmpty()) { mapNew = mapOut.getCopy(); } else { mergeMaps(mapNew, mapOut); } } if (extraVarVersions.containsKey(node.id)) { SFormsFastMapDirect mapExtra = extraVarVersions.get(node.id); if (mapNew.isEmpty()) { mapNew = mapExtra.getCopy(); } else { mergeMaps(mapNew, mapExtra); } } inVarVersions.put(node.id, mapNew); }