...The grid transforms each element in the collection into a child view by using the supplied closure. WaterfallGrid works with identifiable data (like SwiftUI.List). You can make your data identifiable in one of two ways: by passing along with your data a key path to a property that uniquely identifies each element, or by making your data type conform to the Identifiable protocol. To customize the appearance of the grid call the gridStyle function and pass the parameters you want to customize.