Is there a way filter event by severity?

[li-jun-fei]

here is the code
`category=["error"] #EventSeverity: error,info,user,warning
filter_spec = vim.event.EventFilterSpec(eventTypeId=event_type_list, time=time_filter,category=category)

eventManager = si.content.eventManager
event_collector = eventManager.CreateCollectorForEvents(filter_spec)`
but the error category filter is not working,warning filter works fine (vsphere 7.0u3)