Set a default implementation for a protocol function.

ProtocolFuncDefault.swift

public protocol SwipeTableViewCellDelegate: class {
    func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath, for orientation: SwipeActionsOrientation) -> [SwipeAction]?
    func tableView(_ tableView: UITableView, editActionsOptionsForRowAt indexPath: IndexPath, for orientation: SwipeActionsOrientation) -> SwipeTableOptions
}

/**
 Default implementation of `SwipeTableViewCellDelegate` methods
 */
public extension SwipeTableViewCellDelegate {
    func tableView(_ tableView: UITableView, editActionsOptionsForRowAt indexPath: IndexPath, for orientation: SwipeActionsOrientation) -> SwipeTableOptions {
        return SwipeTableOptions()
    }
}