Factory method targetting dynamic contexts which allows a new XmlSlurper to be created. It is intended to assist with migration from Groovy 2.5.x to Groovy 3+. Code using this factory will not need to change moving from 2.x to 3+. In Groovy 2.5.x, a groovy.util.XmlSlurper will be returned. For Groovy 3+, a groovy.xml.XmlSlurper will be returned. For contexts requiring additional static type checking, it is recommended simply to use the normal constructor and change the package to groovy.xml prior to reaching Groovy 4.