AnyDispatcher.swift

struct AnyDispatcher<R, O>: Dispatcher {
    private let _execute: (R, (O) -> Void, (Error) -> Void) -> Void
    
    init<D: Dispatcher>(_ dispatcher: D) where R == D.Request, O == D.Output {
        _execute = dispatcher.execute
    }
    
    func execute(request: R, success: (O) -> Void, failure: (Error) -> Void) {
        _execute(request, success, failure)
    }
}