code: public ReadOperation<BsonDocument> asExplainableOperation(final ExplainVerbosity explainVerbosity) {
          if (countStrategy.equals(CountStrategy.COMMAND)) {
              return createExplainableOperation(explainVerbosity);
          } else {
              return getAggregateOperation().asExplainableOperation(explainVerbosity);
          }
      }
docs: Gets an operation whose execution explains this operation.
  
  @param explainVerbosity the explain verbosity
  @return a read operation that when executed will explain this operation