How can I get IProgressInformation or similar on server side

Hi,
I was wondering if could I get the information displayed bycom.ibm.team.apt.kind.internal.progress , inside an IOperationParticipant.
I could query all children of my WorkItem and summarize all estimated and spent times, but I guess that there is a method already done for that.
Searching around I foundIProgressInformation , but I guess it is limited to IDE client.
In short: From IOperationParticipant, how can I get estimated and spent time for an workitem and all its children, just like appears at progress bar (com.ibm.team.workitem.web.ui.internal.view.story.StoryProgressBar ).
Thanks.
I was wondering if could I get the information displayed by
I could query all children of my WorkItem and summarize all estimated and spent times, but I guess that there is a method already done for that.
Searching around I found
In short: From IOperationParticipant, how can I get estimated and spent time for an workitem and all its children, just like appears at progress bar (
Thanks.