Reimplementing SwiftUI's PickerStyle.menu to be able to use any custom ButtonStyle

CustomMenuPicker.swift

import SwiftUI

public struct CustomMenuPicker<Item: Hashable, Content: View>: View {
	var label: LocalizedStringKey
	var items: [Item]
	@Binding var selection: Item
	var content: (Item) -> Content
	
	public init(
		_ label: LocalizedStringKey,
		selection: Binding<Item>,
		items: [Item],
		@ViewBuilder content: @escaping (Item) -> Content
	) {
		self.label = label
		self.items = items
		self._selection = selection
		self.content = content
	}
	
	public var body: some View {
		Menu {
			ForEach(items, id: \.self) { item in
				Toggle(
					isOn: Binding(
						get: { selection == item },
						set: { isOn, _ in
							guard isOn else { return }
							selection = item
						}
					)
				) {
					content(item)
						.tag(item)
				}
			}
		} label: {
			HStack(spacing: 5) {
				content(selection)
					.contentTransition(.opacity)
				
				Image(systemName: "chevron.up.chevron.down")
					.imageScale(.small)
			}
		}
	}
}