multi header issue

Suite and Optimus Suite 5
#1

i would like to drow multi header
ex )
myGrid.setHeader(“a,#cspan,b”);
myGrid.attachHeader(["#rspan","#rspan","#rspan"]);
myGrid.attachHeader([“1”,“2”,"#rspan"]);

Desired results

row|a |b
row| |

row|1 | 2 | 3

there is not 2row and 2colunm merge and 3th column divide

how can i drow it ?

#2

unfortunately the cell cannot be in the cspan and a rowspan at the same time.