code: function detectInTree(tree, handlers) {
    var detectedOptions = {};
    // We walk across complete tree for each handler,
    // because we need strictly maintain order in which handlers work,
    // despite fact that handlers work on different level of the tree.
    handlers.forEach(function(handler) {
      detectedOptions[handler.name] = handler.detect(tree);
    });
    return detectedOptions;
  }
docs: Processes tree and detects options.
  
  @param {Array} tree
  @param {Array} handlers List of options that we should look for
  @returns {Object} Map with detected options and all variants of possible
  values