protected void printSectionFor(Target t, Node n) {
    if (n == null) {
      n = root ;
    }
    if (n.section.depth == 0) {
      if (n.includes(t)) {
        I.say("  "+key+" FOUND SECTION MATCHES FOR "+t) ;
        I.say("    SECTION AT "+n.section.area) ;
      }
    }
    else for (Object k : n) printSectionFor(t, (Node) k) ;
  }