Design Studio 1.5 how to get Filtercount information ?

Hello,

where or how can i get the "FilterCount" Information of a Dimension from a DS ?

I have: DS_2.getMembers(); DS_2.getMemberList();

but not: DS_2.getFilterCount();

i Need it for an if/else script like this:

if (condition / 0 member is selected) {if statement}

if (condition / 1 member is selected) {if statement}

if (condition / 2 members are selected) {if statement}

if (condition / all members are selected) {if statement}

Kind regards,

Andre