code: function render(templatePath, outputPath, element, options) {
      var template = fs.readFileSync(templatePath, 'utf8'),
          rendered = "",
          renderedOutput = "";
  
      element  = element || null;
      options  = options || {};
  
      _.extend(options, {
          mdjson   : mdjson,
          filename : templatePath, // to avoid "include" error
          root     : mdjson.getRoot(),
          element  : element
      });
  
      // Append predefined filters
      if (!options.filters) {
          options.filters = {};
      }
      _.extend(options.filters, filters);
  
      rendered = ejs.render(template, options);
      renderedOutput = ejs.render(outputPath, options);
      fs.ensureFileSync(renderedOutput);
      fs.writeFileSync(renderedOutput, rendered);
  }
docs: Render a template file with options and save to an output file
  
  @param{string} templatePath Path for a template file
  @param{string} outputPath Path for an output file. You can use ejs expression (e.g. `out/<% element.name %>.java`)
  @param{Element} element Element to be rendered
  @param{Object} options Options used for ejs rendering