+ /// move backward one logical position
+ void backwardPos();
+ /// move backward one physical character or inset
+ void backwardChar();
+ /// move backward one paragraph
+ void backwardPar();
+ /// move backward one cell
+ void backwardIdx();
+ /// move backward one inset
+ void backwardInset();
+
+ /// are we some 'extension' (i.e. deeper nested) of the given iterator
+ bool hasPart(DocIterator const & it) const;
+