(Swift 3,4,5...) XML Add Child Tree

Demonstrates the Xml.AddChildTree method.

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func chilkatTest() {
    var success: Bool

    // Build the following XML:

    // <?xml version="1.0" encoding="utf-8"?>
    // <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
    //     <soap12:Body>
    //         <cteDadosMsg xmlns="http://www.portalfiscal.inf.br/cte/wsdl/CTeStatusServicoV4">
    // 	   </cteDadosMsg>
    //     </soap12:Body>
    // </soap12:Envelope>

    let xml = CkoXml()!
    xml.tag = "soap12:Envelope"
    xml.addAttribute("xmlns:xsi", value: "http://www.w3.org/2001/XMLSchema-instance")
    xml.addAttribute("xmlns:xsd", value: "http://www.w3.org/2001/XMLSchema")
    xml.addAttribute("xmlns:soap12", value: "http://www.w3.org/2003/05/soap-envelope")
    xml.updateAttr(at: "soap12:Body|cteDadosMsg", autoCreate: true, attrName: "xmlns", attrValue: "http://www.portalfiscal.inf.br/cte/wsdl/CTeStatusServicoV4")

    // We want to add the following XML as a sub-tree under the "cteDadosMsg" element.

    // <consStatServCTe versao="4.00" xmlns="http://www.portalfiscal.inf.br/cte">
    //     <tpAmb>2</tpAmb>
    //     <cUF>43</cUF>
    //     <xServ>STATUS</xServ>
    // </consStatServCTe>

    // Build the XML to be added as a child tree.

    let xml2 = CkoXml()!
    xml2.tag = "consStatServCTe"
    xml2.addAttribute("versao", value: "4.00")
    xml2.addAttribute("xmlns", value: "http://www.portalfiscal.inf.br/cte")
    xml2.updateChildContent("tpAmb", value: "2")
    xml2.updateChildContent("cUF", value: "43")
    xml2.updateChildContent("xServ", value: "STATUS")

    // Add the child tree at the desired location:
    // Temporarily point to the location where we wish to add the child tree.
    success = xml.findChild2("soap12:Body|cteDadosMsg")
    if success == false {
        // Restore current location to the root.
        xml.getRoot2()
        return
    }

    success = xml.addChildTree(xml2)
    // Restore the current location to the root.
    xml.getRoot2()

    // You can see now that the XML contain the child tree:

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

    // <?xml version="1.0" encoding="utf-8"?>
    // <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
    //     <soap12:Body>
    //         <cteDadosMsg xmlns="http://www.portalfiscal.inf.br/cte/wsdl/CTeStatusServicoV4">
    //             <consStatServCTe versao="4.00" xmlns="http://www.portalfiscal.inf.br/cte">
    //                 <tpAmb>2</tpAmb>
    //                 <cUF>43</cUF>
    //                 <xServ>STATUS</xServ>
    //             </consStatServCTe>
    //         </cteDadosMsg>
    //     </soap12:Body>
    // </soap12:Envelope>

}