TableViewDSL.iflet.swift

public struct IfLet<T: OptionalType>: Content {
    let data: T
    let builder: (T.Wrapped) -> Content

    public init(_ data: T, @ContentBuilder _ builder: @escaping (T.Wrapped) -> Content) {
        self.data = data
        self.builder = builder
    }
    
    public var contents: [Content]? {
        guard let value = data.value else {
            return nil
        }
        return [builder(value)]
    }
}