Code from the blog post about namespacing UITableView API. See http://vojtastavik.com/2017/11/14/namespace-all-the-things/

UIKit_Table.swift

import UIKit

enum UIKit { // UIKit namespace simulation
  enum Table { // The new "root" namespace for UITableView
    typealias View = UITableView
    typealias ViewController = UITableViewController
    typealias Cell = UITableViewCell
  }
}

// If there wouldn't be a type named 'Table' in the current module,
// we could referent to 'UIKit.Table' by a simple 'Table'.
typealias Table = UIKit.Table

extension UIKit.Table {
  typealias DataSource = UITableViewDataSource
  typealias Delegate = UITableViewDelegate
}

class MyClass { }

extension MyClass: Table.DataSource {
  func tableView(_ tableView: Table.View, cellForRowAt indexPath: IndexPath) -> Table.Cell {
  }
}

class MyTableView: Table.View { }

class MyTableViewController: Table.ViewController { }

// You can refer to the type by its full namespace hierarchy, too.
class MyTableViewCell: UIKit.Table.Cell { }

extension UIKit.Table.Cell {
  typealias Style = UITableViewCellStyle
  typealias SeparatorStyle = UITableViewCellSeparatorStyle
  typealias SelectionStyle = UITableViewCellSelectionStyle
}

let cellStyle: Table.Cell.Style = .default
let separatorStyle: Table.Cell.SeparatorStyle = .singleLine
let selectionStyle: Table.Cell.SelectionStyle = .blue