text: #include <string>
  #include <sstream>
  #include <algorithm>
  #include <set>
  #include <iomanip>
  #include <ctime>
  #include "theme_api.h"
  #include "layout.hpp"
  
  using namespace std;
  using namespace gomibako;
  
  extern string comment_html;
  
  extern"C" void render_custom_page(ostringstream &out, const CustomPage &page,
                                    const SiteInformation &site_information,
                                    shared_ptr<URLMaker> url_maker) {
      ostringstream title;
      title << page.title << " | " << site_information.name;
      header(out, site_information, url_maker, title.str());
      out << 
  R"(<div class="post">
      <h1 id="title">)" << page.title << R"(</h1>
      <article>
      )" << page.content << R"(
      </article>
  )";
      out << comment_html;
      out << "</div>";
      footer(out);
  }