int wordCount() const;
int charCount(bool with_blanks) const;
+ // this is const because it does not modify the buffer's real contents,
+ // only the mutable flag.
+ void setChangesPresent(bool) const;
+ bool areChangesPresent() const;
+ void updateChangesPresent() const;
+
private:
friend class MarkAsExporting;
/// mark the buffer as busy exporting something, or not