code: function extractTodoTitle (content, conf) {
    var result = null;
  
    var labels = {};
    _.each(conf, function (value, key) {
      if (value && key.match(/^label\./)) {
        var trigger = key.substring(6);
        if (conf["label-whitespace"]) {
          trigger += " ";
        }
        labels[trigger] = value;
      }
    });
  
    if (_.isString(content)) {
      _.find(Object.keys(labels), function (trigger) {
        var index;
        if (conf["case-sensitive"]) {
          index = content.indexOf(trigger);
        } else {
          index = content.toUpperCase().indexOf(trigger.toUpperCase());
        }
  
        if (index !== -1) {
          var title = content.substring(index + trigger.length).trim();
          var issue = null;
          if (title && !isCode(title)) {
            var match = title.match(/^\s+#(\d+)\s+/);
            if (match) {
              issue = match[1];
              title = title.substring(match[0].length);
            }
            result = {
              "title":  title,
              "label":  labels[trigger],
              "issue":  Number(issue)
            };
          }
          return true; // break
        }
      });
    }
  
    return result;
  }
docs: String → {title, label}