func isLoadDetailEdited(_ loadDetail: LoadDetail) -> Bool {
        // get original (non-edited) value of loadDetail
        if let originalDetail = loadDetail.load?.getOriginDetail(loadDetail) {

            // get editable values of both original and edited value
            let originalValues = originalDetail.editableValues()
            let comparingValues = loadDetail.editableValues()

            // iterate through the values and compare
            for i in 0..<originalValues.count {
                if originalValues[i] is Int {
                    if originalValues[i] as! Int != comparingValues[i] as! Int {
                        return true
                    }
                } else if originalValues[i] is String {
                    if originalValues[i] as! String != comparingValues[i] as! String {
                        return true
                    }
                } else if originalValues[i] is Double {
                    if originalValues[i] as! Double != comparingValues[i] as! Double {
                        return true
                    }
                }

            }
        }

        return false
    }