Query for only recurring events using Exchange Web Services

Hi,

I am trying to fetch only recurring events from a calendar using EWS, but couldn't find a way.

I can filter on isRecurring using FindItem, but it's not reliable. https://msdn.microsoft.com/en-us/library/office/bb204271%28v=exchg.150%29.aspx

I am aware that I can filter on CalendarItemType, once I get the results. Is there any way to do the filtering in the FindItem query itself?

Thanks