cannot find DefaultChangeHistoryManager in jira-api-5.0

Hi

I want write a report for jira to track the time on diffenert status.

I was able to use DefaultChangeHistoryManager in Jira SDK 4.x and the plugin is working.

but when I try to deploy it to a Jira 5.1 server, I get a lot off missing class exception. So I rewrite the plugin with SDK 5. However, I was unable to find the class in the API library.

here is my code

User remoteUser = action.getRemoteUser();
OfBizDelegator ofBizDelegator = (OfBizDelegator) ComponentManager.getComponentInstanceOfType(OfBizDelegator.class);

DefaultChangeHistoryManager changeManager = new DefaultChangeHistoryManager(ComponentManager.getInstance().getIssueManager(), ofBizDelegator, ComponentManager.getInstance().getPermissionManager(), null);    	
     
searchresults = searchProvider.search(query, remoteUser,PagerFilter.getUnlimitedFilter());

Has anyone a idea for me????

Many thanks in advance

Max