Index: main/grid/model.lisp
===================================================================
--- main/grid/model.lisp	(revision main,22)
+++ main/grid/model.lisp	(revision main,26)
@@ -36,2 +36,8 @@
 column COLUMN.  ROW and COLUMN refer to data rows and columns, not
 character or text rows and columns.  Rows and columns are zero-based."))
+
+(defgeneric uses-display-strings (grid-data row column)
+  (:documentation
+   "Returns T if the item uses display-strings, or at least has
+already been properly escaped.")
+  (:method (grid-data row column)))