setRevisionable(TRUE); $fields['user_id']->setRevisionable(TRUE); $fields['non_rev_field'] = BaseFieldDefinition::create('string') ->setLabel(t('Non Revisionable Field')) ->setDescription(t('A non-revisionable test field.')) ->setRevisionable(FALSE) ->setTranslatable(TRUE) ->setCardinality(1) ->setReadOnly(TRUE); return $fields; } }