```js !!book.generate name:'tfgrid4specs' title:'TFGrid Specs 4.0' url:'https://git.ourworld.tf/tfgrid/info_tfgrid/src/branch/main/books/tfgrid4specs' production: true !!doctree.add url:'https://git.ourworld.tf/tfgrid/info_tfgrid/src/branch/main/collections/tfgrid4specs' !!doctree.add url:'https://git.ourworld.tf/tfgrid/info_tfgrid/src/branch/main/collections/tech' !!doctree.add url:'https://git.ourworld.tf/tfgrid/info_tfgrid/src/branch/main/collections/tfgrid4' ```