To Do - [x] My package dependency should be a tree, not a network. → See draw.io. - [x] Packages should `import` specific fun, not depend (=and load) an entire package - [x] Define what load-dependencies are essential for each package - [x] Then rest of fun's get `::`. - [ ] Add `::`-s - [x] Check dependencies in each package - [x] Get a package that fixes dependencies. - [x] Maria ` tools::package_dependencies`.