plone - How to change field changeNote from IVersionable behavior to be required -

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i have use case users should allways fill changenote field when saving changes on content. possible (ttw) change changenote field iversionable behavior required ? , if not, possible in code ? best way override standard fields properties foreign/preinstalled behaviors ?

i don't know if there's way may override value of required attribute implementing in code:

(pdb) plone.app.versioningbehavior.behaviors import iversionable (pdb) iversionable <schemaclass plone.app.versioningbehavior.behaviors.iversionable> (pdb) iversionable['changenote'] <zope.schema._bootstrapfields.textline object @ 0x7fe45a60f550> (pdb) iversionable['changenote'].required false (pdb) iversionable['changenote'].required = true (pdb) iversionable['changenote'].required true

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