creating snapshot of vm using vRO.

Hi All,

I have been trying to learn developingworkflows using vRO.

to start with i thought of creating workflow of taking snapshot of vm using vRO.

i have duplicated the default workflow of creating snapshot and wants to add another decision element "if there is already a snapshot workflow should end ".

what needs to be edited in decision element so that i meet the requirement of stopping workflow if there is already a snapshot?

any help is highly appriciated.