@Override
  public Set computeDependencies(ExecutionContext context)
      throws TypeMismatchException, NameResolutionException {
    context.addDependencies(this, elm.computeDependencies(context));
    return context.addDependencies(this, colln.computeDependencies(context));
  }
Invariant: the receiver is dependent on the current iterator.
geode-core/src/main/java/org/apache/geode/cache/query/internal/CompiledIn.java