Delete Sub Child XML Nodes

[GroovyBeginner]

I am unable to delete the sub child xml Nodes. Here is the input and code am
trying with

import groovy.xml.*;
def employees='''<Employees>
                      <Employee>
                         <ID>123</ID>
                         <Name>xyz</Name>
                         <Addresses>
                             <Address>
                                <Country>USA</Country>
                                <ZipCode>40640</ZipCode>
                             </Address>
                          </Addresses>
                      </Employee>
                      <Employee>
                         <ID>345</ID>
                         <Name>abc</Name>
                         <Addresses>
                             <Address>
                                <Country>CA</Country>
                                <ZipCode>50640</ZipCode>
                             </Address>
                          </Addresses>
                      </Employee>
                    </Employees>'''
def fields = ['Name','ZipCode']
def xml = new XmlParser().parseText(employees)
xml.Employee.each { node ->
     node.children().reverse().each{ 
        if(!fields.contains(it.name())) { 
            node.remove(it)
        }
    }
}

XmlUtil.serialize(xml)

How to delete the node ZipCode from the xml?



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