-/// updates all counters
-void updateLabels(Buffer const &, bool childonly = false);
-
-///
-void updateLabels(Buffer const &, ParIterator &);
-
-///
-void checkBufferStructure(Buffer &, ParIterator const &);
-
-///
-void loadChildDocuments(Buffer const & buffer);
+/// Count the number of chars in the text between these two iterators
+int countChars(DocIterator const & from, DocIterator const & to, bool with_blanks);