class ViewControllerData: UIViewController, UITableViewDataSource, UITableViewDelegate {

    @IBOutlet weak var tableViewData: UITableView!
    var saleOrder : SaleOrder?  // THIS! <--------

    // In this closure I want take the edited object.
    let funcReturnFromEdit = { (saleEdited : SaleOrder) -> () in
        saleOrder = saleEdited // I can't do this.
    }

    ....

      override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        segue.identifier == "segueEditOrder" {
        let editVc = segue.destination as! ViewControllerEdit
        if saleOrder != nil {
            editVc.saleOrderToEdit = saleOrder!.copy() as! SaleOrder
        }
        editVc.funcReturn = self.funcReturnFromEdit // <-- Not works
    }
}

class ViewControllerEdit: UIViewController, UITableViewDelegate, UITableViewDataSource {

    var saleOrderToEdit : SaleOrder?

    var funcReturn = { (SaleOrder) -> Void in {} } // <- This not compile. How to do this?

    ...
    /*
     Funcs to make edition...
    */

    func endEditions() {
        funcReturn(saleOrderToEdit) // <- Here I want send to back ViewControllerData
    }
}

saleOrder = saleEdited

self.saleOrder = saleEdited