(Swift 3,4,5...) ExtractChildByName using a Tag Path

Demonstrates calling ExtractChildByName with a tag path.

This example requires Chilkat v9.5.0.64 or greater.

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func chilkatTest() {
    let xml = CkoXml()!

    xml.tag = "world"

    // This example uses features introduced in v9.5.0.64
    xml.newChild2("north_america|united_states|california|san_francisco", content: "Silicon Valley")
    xml.newChild2("north_america|united_states|california|san_diego", content: "Birthplace of California")
    xml.newChild2("north_america|united_states|illinois|chicago", content: "Windy City")

    print("\(xml.getXml()!)")

    // Produces the following XML
    // 
    // 	<?xml version="1.0" encoding="utf-8" ?>
    // 	<world>
    // 	    <north_america>
    // 	        <united_states>
    // 	            <california>
    // 	                <san_francisco>Silicon Valley</san_francisco>
    // 	                <san_diego>Birthplace of California</san_diego>
    // 	            </california>
    // 	            <illinois>
    // 	                <chicago>Windy City</chicago>
    // 	            </illinois>
    // 	        </united_states>
    // 	    </north_america>
    // 	</world>
    // 

    var xCalif: CkoXml? = xml.extractChild(byName: "north_america|united_states|california", attrName: "", attrValue: "")

    print("\(xCalif!.getXml()!)")
    xCalif = nil

    // xCalif contains:

    // 	<?xml version="1.0" encoding="utf-8" ?>
    // 	<california>
    // 	    <san_francisco>Silicon Valley</san_francisco>
    // 	    <san_diego>Birthplace of California</san_diego>
    // 	</california>

    print("\(xml.getXml()!)")

    // xml now contains:

    // 	<?xml version="1.0" encoding="utf-8" ?>
    // 	<world>
    // 	    <north_america>
    // 	        <united_states>
    // 	            <illinois>
    // 	                <chicago>Windy City</chicago>
    // 	            </illinois>
    // 	        </united_states>
    // 	    </north_america>
    // 	</world>

}