NiceActionCreatorUsage.swift

/// Action creator
func downloadProfile(state: ApplicationState) -> Action {
    return Downloader.DownloadUserProfile(
        baseURL: state.api.profile.baseURL
        endpoint: state.api.profile.getProfile
        profileID: state.profile.id
        authToken: state.auth.token
        retryCount: state.api.retryCount
    )
}

// then our method is just
func profileScreenisAboutToAppear() {
    core.dispatch(action: downloadProfile(state: state))
}