String getRegionPathForIndependentRuntimeIterator(RuntimeIterator riter) {
    return indpndtItrToRgnMap.get(riter);
  }
This method returns the Region path for the independent RuntimeIterator if itr exists else
returns null. It is the caller's responsibility to ensure that the passed Iterator is the
ultimate Independent Runtime Iterator or else the method may return null if the RunTimeIterator
is genuinely dependent on a Region iterator

@return String containing region path
geode-core/src/main/java/org/apache/geode/cache/query/internal/ExecutionContext.java