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extension Array {
    subscript(indexPath: IndexPath) -> Element {
        self[indexPath.row]
    }
}

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extension CGSize {
    func addingPadding(width: CGFloat, height: CGFloat) -> CGSize {
        CGSize(width: self.width + width, height: self.height + height)
    }
}

// Usage:

class PaddedButton: UIButton {
    override var intrinsicContentSize: CGSize {

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extension NSAttributedString {
    func highlighting(_ substring: String, using color: UIColor) -> NSAttributedString {
        let attributedString = NSMutableAttributedString(attributedString: self)
        attributedString.addAttribute(.foregroundColor, value: color, range: (self.string as NSString).range(of: substring))
        return attributedString
    }
}

// Usage:

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extension UIView {
    func superview<T>(of type: T.Type) -> T? {
        return superview as? T ?? superview.flatMap { $0.superview(of: type) }
    }
}

// Example usage:

func textFieldDidBeginEditing(_ textField: UITextField) {
    // Get the cell containing the textfield.

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extension UIViewController {
    func embed(_ vc: UIViewController, in _containerView: UIView? = nil) {
        let containerView: UIView = _containerView ?? view // Use the whole view if no container view is provided.
        containerView.addSubview(vc.view)
        NSLayoutConstraint.activate([
            vc.view.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: 0),
            vc.view.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: 0),
            vc.view.topAnchor.constraint(equalTo: containerView.topAnchor, constant: 0),
            vc.view.bottomAnchor.constraint(equalTo: containerView.bottomAnchor, constant: 0)
        ])

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extension UIColor {
    static var accent: UIColor {
        UIColor(named: "Accent")!
    }
    
    static var primary: UIColor {
        UIColor(named: "Primary")!
    }
    
    static var primaryText: UIColor {

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UIColor(named: "Primary")

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cell.item = items[indexPath.row]

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//: A UIKit based Playground for presenting user interface
  
import UIKit
import PlaygroundSupport

final class Cell: UITableViewCell {
    
    private let borderLayer = CAShapeLayer()
    private let _backgroundView = UIView()

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UIFont(name: "Quicksand-Bold", weight: 16)