+ /// \param len: length of the resulting string
+ /// NOTE This routine is kind of slow. It's fine to use it within the
+ /// GUI, but definitely do not try to use it in updateBuffer or anything
+ /// of that sort. (Note: unnecessary internal copies have been removed
+ /// since the previous note. The efficiency would have to be assessed
+ /// again by profiling.)
+ docstring toolTipText(docstring prefix = empty_docstring(),
+ size_t len = 400) const;