Author: Elliot Levin (elliotlevin@hotmail.com)
Inheritance: extends Pinq\Providers\DSL\Compilation\Processors\RequestQueryProcessor, implements Pinq\Queries\Requests\IRequestVisitor
 public function visitAggregate(Requests\Aggregate $request)
 {
     return parent::visitAggregate($request->update($this->expressionProcessor->processFunction($request->getAggregatorFunction())));
 }