public static IStreamRelativeAccess getOptPreviousExprRelativeAccess(AgentInstanceViewFactoryChainContext agentInstanceViewFactoryContext) {
IStreamRelativeAccess relativeAccessByEvent = null;
if (agentInstanceViewFactoryContext.getPreviousNodeGetter() != null)
{
RelativeAccessByEventNIndexMap getter = (RelativeAccessByEventNIndexMap) agentInstanceViewFactoryContext.getPreviousNodeGetter();
relativeAccessByEvent = new IStreamRelativeAccess(getter);
getter.updated(relativeAccessByEvent, null);
}
return relativeAccessByEvent;
}