The View protocol is the fundamental building block of SwiftUI. Any struct that conforms to View must implement a computed property called body that returns some View. This represents the content and behavior of the view.
protocol View {
associatedtype Body : View
var body: Self.Body { get }
}
The some View return type is an opaque type that allows the compiler to determine the actual return type while hiding implementation details from the caller.
Rewriting in plainer words…
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