LazySwiftDeclaration.swift

import UIKit
import MapKit

extension MKMapView {
    /**
    Closure passes itself in
    */
    public typealias MKMapViewBuilderClosure = (MKMapView) -> Void
    
    /**
    Add convenience initializer with the builder as its 
    optional parameter
    */
    public convenience init(builder:MKMapViewBuilderClosure?) {
        self.init()
        if let closure = builder {
            closure(self)
        }
    }
}