//core data tutorial swift https://medium.com/xcblog/core-data-with-swift-4-for-beginners-1fc067cca707 https://medium.com/@ankurvekariya/core-data-crud-with-swift-4-2-for-beginners-40efe4e7d1cc
//DB Browser for SQLite. https://sqlitebrowser.org/ https://sqlitebrowser.org/blog/version-3-11-2-released/