docs: function importerSync(options, handler) {
      var modulePath, recursive = false, parent = '';
  
      if (typeof options === 'string') {
          modulePath = options;
  
      } else {
          modulePath = options.path;
          recursive = options.recursive || recursive;
          parent = options.parent || parent;
          if (!modulePath) throw new Error("module directory path must be given.");
      }
  
      // absolute path? or relevant path?
      if (modulePath.indexOf('/') != 0) {
          // relevant. join with parent module's path
          modulePath = path.join(path.dirname(module.parent.parent.filename), modulePath);
      }
  
      var files = fs.readdirSync(modulePath);
      for (var i in files) {
          var name = files[i];
  
          if (recursive && fs.lstatSync(path.join(modulePath, name)).isDirectory()) {
              importerSync({
                  path: path.join(modulePath, name),
                  recursive: true,
                  parent: path.join(parent, name)
              }, handler);
              continue;
          }
          if (name.lastIndexOf('.js') != name.length - 3) continue;
  
          name = name.substring(0, name.lastIndexOf('.')); // remove ext
          var moduleObj = require(path.join(modulePath, name));
          if (handler) handler(moduleObj, path.join(parent, name));
      }
  }