Opt-in extra : extended
<text:section>features —text:section-source,text:section-decl,text:dde-connectioninside a section, plustext:protected/text:condition/text:display/text:protection-keyattributes.
Module textSectionsAdvanced | Source packages/front/office/odf/src/extra/text-sections-advanced.js
Hooks
hydrateSection(s) / dehydrateSection(s) — promotes protection
attrs into s.protection and section-aux children into
s.sectionNodes[].