/**
* If set to true, items having child-items can be expanded to show the child-items as
- * part of the view. Per default the expanding of items is is disabled. If expanding of
+ * part of the view. Per default the expanding of items is disabled. If expanding of
* items is enabled, the methods KItemModelBase::setExpanded(), KItemModelBase::isExpanded(),
* KItemModelBase::isExpandable() and KItemModelBase::expandedParentsCount()
* must be reimplemented. The view-implementation