@Override
  public void afterIterationEvaluation(Object result) {}
Called once after the evaluation of an expression for a single iteration of a 'select'
statment.

@param result The result of evaluating the where clause. Should be either a Boolean, NULL, or
       UNDEFINED. If evaluating the where clause threw an exception, should be NULL.
geode-core/src/main/java/org/apache/geode/cache/query/internal/QueryObserverAdapter.java