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* fix(node): Don't use global variables for jsdom injection Introduce a (hopefully generally applicable) mechanism for injecting dependencies into modules, specifically in this case to inject required bits of JSDOM's Window and Document implementations into core/utils/xml.js when running in node.js or other environments lacking a DOM. The injectDependencies function uses an options object to facilitate optionally injecting multiple named dependencies at the same time. Rename the xmlDocument local variable back to document (was renamed in #5461) so that the name used in this module corresponds to the usual global variable it replaces. Change the injection in scripts/package/node/core.js to use injectDependencies instead of setXmlDocument + global variables; also eliminate apparently-unnecessary creation of a special Document instance, using the default one supplied by jsdom instead. Fixes #6725. * deprecate(xml): Deprecate getXmlDocument and setXmlDocument Mark getXmlDocument and setXmlDocument as @deprecated, with suitable calls to deprecation.warn(). There are no remaining callers to either function within core - setXmlDocument was only used by the node.js wrapper, and and apparently getXmlDocument was never used AFAICT - and we do not anticipate that either were used by external developers. * fix: Corrections for comments on PR #6764.