GetEditedElementInstancesInfos now optimized as well. Forgotten because not using [R.I.P]LibraryResolver, but still XSLT compiling was hapenning on each call.

<?xml version='1.0' encoding='utf-8'?>
<BaseParams xmlns:xsd="http://www.w3.org/2001/XMLSchema" IEC_Channel="0" Name="py_ext_0"/>