Map<ExprPreviousNode, ExprPreviousEvalStrategy> strategies = new HashMap<ExprPreviousNode, ExprPreviousEvalStrategy>();
for (int streamNum = 0; streamNum < contexts.length; streamNum++) {
// get stream-specific info
ViewResourceDelegateVerifiedStream delegate = viewResourceDelegate.getPerStream()[streamNum];
// obtain getter
handlePrevious(delegate.getPreviousRequests(), contexts[streamNum].getPreviousNodeGetter(), strategies);
}
return strategies;
}