What type does a ViewBuilder body actually produce for modifiers, if, several views and AnyView, and why does it matter?

Predict first

What types do these builders produce?

import SwiftUI

struct Probe: View { var body: some View { Text("hi").padding().background(Color.red) } }
struct Cond: View { var flag: Bool; var body: some View { if flag { Text("a") } else { Image(systemName: "star") } } }
struct Tup: View { var body: some View { Text("a"); Text("b") } }
struct Many: View {
    var body: some View {
        Text("1"); Text("2"); Text("3"); Text("4"); Text("5"); Text("6")
        Text("7"); Text("8"); Text("9"); Text("10"); Text("11"); Text("12")
    }
}
struct Erased: View { var flag: Bool; var body: some View { flag ? AnyView(Text("a")) : AnyView(Image(systemName: "star")) } }
struct Opt: View { var show: Bool; var body: some View { if show { Text("x") } } }
struct Loop: View { var body: some View { ForEach([1, 2], id: \.self) { Text("\($0)") } } }
func name<T>(_ t: T) -> String {
    String(reflecting: T.self).replacingOccurrences(of: "SwiftUI.", with: "").replacingOccurrences(of: "SwiftUICore.", with: "")
}
print("modifiers:", name(Probe().body))
print("if/else:", name(Cond(flag: true).body))
print("two views:", name(Tup().body))
print("twelve views:", name(Many().body))
print("AnyView:", name(Erased(flag: true).body))
print("lone if:", name(Opt(show: true).body))
print("ForEach:", name(Loop().body))

• nested ModifiedContent, _ConditionalContent, a tuple of 12 compiles, AnyView, Optional, ForEach
• every body is just a View
• twelve children do not compile