code: def register():
      
      if not plim:
          logger.warning('`slim` failed to load dependency `plim`. '
                         '`slim` plugin not loaded.')
          return
      if not mako:
          logger.warning('`slim` failed to load dependency `mako`. '
                         '`slim` plugin not loaded.')
          return
      if not bs:
          logger.warning('`slim` failed to load dependency `BeautifulSoup4`. '
                         '`slim` plugin not loaded.')
          return
      if not minify:
          logger.warning('`slim` failed to load dependency `htmlmin`. '
                         '`slim` plugin not loaded.')
          return
  
      signals.get_writer.connect(get_writer)
docs: Plugin registration.