code: function(path, contents) {
      // If template path is found in the cache, return the contents.
      if (path in this._cache && contents == null) {
        return this._cache[path];
      // Ensure path and contents aren't undefined.
      } else if (path != null && contents != null) {
        return this._cache[path] = contents;
      }
  
      // If the template is not in the cache, return undefined.
    }
docs: Cache templates into LayoutManager._cache.