Currently when i implement the combo filtering in the header, the available options in the dropdown are populated based on how many different cell values the grid has for the column. I would like to be able to put ANY amount of options in the combo.
For example i would like the combo to have the following options: [A, B, C, D, E] in spite of the grid column have only [A, D] cell values.
With other orders how can i implement the combo dropdown to have options independent of grid cell values?