Add comment to displaySchema

matlab/src/matlab/+arrow/+tabular/+internal/displaySchema.m

@@ -30,6 +30,15 @@
         % to display bold font and hyperlinks.
         names = compose("<strong>%s</strong>", names);
         classNames = arrayfun(@(type) string(class(type)), types);
+
+        % Creates a string array of with the following form:
+        %  
+        % ["arrow.type.BooleanType" "Boolean" "arrow.type.StringType" "String" ...]
+        %
+        % This string array is passed to the compose call below. The 
+        % format specifier operator supplied to compose contains two 
+        % formatting operators (%s), so compose uses two elements from the
+        % string array (classNameAndIDs) at a time.
         classNameAndIDs = strings([1 numel(typeIDs) * 2]);
         classNameAndIDs(1:2:end-1) = classNames;
         classNameAndIDs(2:2:end) = typeIDs;