HeaderView+InitialiserExtensions.swift

extension HeaderView where RightControls == EmptyView {
    init(viewModel: HeaderViewModel, @ViewBuilder leftControls: @escaping () -> LeftControls) {
        self.init(viewModel: viewModel, leftControls: leftControls, rightControls: { EmptyView() })
    }
}

extension HeaderView where LeftControls == EmptyView, RightControls == EmptyView {
    init(viewModel: HeaderViewModel) {
        self.init(viewModel: viewModel, leftControls: { EmptyView() }, rightControls: { EmptyView() })
    }
}