static Pair<CirclesAndLines, Canvas> showWeb(WebNode node) {
  ret showWeb(node.web);
}

static Pair<CirclesAndLines, Canvas> showWeb(Web web) {
  ret showWebWithAutoLayout(web);
}

static Pair<CirclesAndLines, Canvas> showWeb(S calStructures) {
  ret showWeb(webFromCALStructures_noMerge(calStructures));
}