code: function (page) { // eslint-disable-line object-shorthand
  			// Fill summary with compiled page content
  			helper.summary.forEach((article, i, array) => {
  				if (article.path === page.path) {
  					array[i].content = page.content;
  				}
  			});
  
  			// Returns unchanged page.
  			return page;
  		}
docs: Gitbook hook for page. Function will be executed
  after markdown is processed with other plugins.
  @memberOf module:index~hooks
  @param page
  @returns {page} The same as page parameter.