code: function(file, content) {
          return new Promise(function(resolve, reject) {
              var ast = recast.parse(content);
  
              resolve(ast);
          });
      }
docs: Parses the content of a file
  
  @method _parseFile
  @protected
  @param {String} file The file which should be parsed
  @param {String} content The content of the file which should be parsed
  @return {Promise} Returns a Promise which will be resolved with file's AST