Set<RuntimeIterator> getDependencySet(CompiledValue cv, boolean readOnly) {
    Set<RuntimeIterator> set = dependencyGraph.get(cv);
    if (set == null) {
      if (readOnly) {
        return Collections.emptySet();
      }
      set = new HashSet<>(1);
      dependencyGraph.put(cv, set);
    }
    return set;
  }
Return true if given CompiledValue is dependent on specified RuntimeIterator
geode-core/src/main/java/org/apache/geode/cache/query/internal/ExecutionContext.java