Initialize custom nib views in a type-safe-er way when .xib and implementation files are named the same.

HasNib.swift

public protocol HasNib: class {
    static var nib: UINib { get }
}

public extension HasNib {
    static var nib: UINib {
        return UINib(nibName: String(describing: self), bundle: Bundle(for: self))
    }
}