Tutorial for beginners: https://developer.apple.com/tutorials/app-dev-training

• Important concept: pass object between views.
• struct ScrumsView_Previews: PreviewProvider is just for showing an mock up preview when you coding. It is not a part of the real app.
• Add @State at the beginning to declear a single source of truth at the very most parent view. Use $[variable name] to pass it to child view. In child view initialize with @Binding var [variable name]: [variable type] to use that data.
• The annotation environmentObject(_:) means …