javascript - kendo grid grouping does not display groups in alphabetical order -

i having issue trying grid display grouped on particular column show groups listed in alphabetical order. have 200+ records whereby 1 particular column has 5 different unique data elements. want group grid display on field. when drag column header group of grid, grid displays data grouped field, not in alphabetical order. expect results be:

group a: (multiple rows...) group b: (multiple rows...) group c: (multiple rows...) group d: (multiple rows...) group e: (multiple rows...)

instead, random listing of groups without headings being sorted @ all

group c: (multiple rows...) group a: (multiple rows...) group d: (multiple rows...) group e: (multiple rows...) group b: (multiple rows...)

i have not found in progress/telerik online documentation can tell grouping list groups group headers in alphabetical order.

any explanation of link example code being done appreciated? thank you...