code: function (source, fileExtension, globalOptions, beautify) {
    var path = rcFile.for(this.resourcePath)
      , options = globalOptions || {};
  
    if (globalOptions === null && typeof path === "string") {
      this.addDependency(path);
      options = JSON.parse(stripJsonComments(fs.readFileSync(path, "utf8")));
    }
  
    return beautify(source, getOptionsForExtension(options, fileExtension));
  }
docs: Method parses file synchronously
  @param  {String} source        - file's content.
  @param  {String} fileExtension - file's extension.
  @param  {Object} globalOptions - configuration from weback file.
  @return {String}               - parsed content of file.