Bridges CoreGraphics.CGPathApplierFunction with a standard Swift closure

CGPathApply.swift

extension CGPath {
    func apply(action: @escaping (CGPathElement)->()) {
        var action = action
        apply(info: &action) {
            let action = $0!.bindMemory(to: ((CGPathElement)->()).self, capacity: 1).pointee
            action($1.pointee)
        }
    }
}