Gets the map/reduce counts from the reply.

@example Get the counts.

  result.counts

@return [ Hash ] A hash of the result counts.

@since 2.0.0

Get the cursor id.

@example Get the cursor id.

  result.cursor_id

@return [ Integer ] Always 0 because map reduce doesn‘t return a cursor.

@since 2.5.0

Get the documents from the map/reduce.

@example Get the documents.

  result.documents

@return [ Array<BSON::Document> ] The documents.

@since 2.0.0

If the result was a command then determine if it was considered a success.

@note If the write was unacknowledged, then this will always return

  true.

@example Was the command successful?

  result.successful?

@return [ true, false ] If the command was successful.

@since 2.0.0

Get the execution time of the map/reduce.

@example Get the execution time.

  result.time

@return [ Integer ] The executing time in milliseconds.

@since 2.0.0

Validate the result by checking for any errors.

@note This only checks for errors with writes since authentication is

  handled at the connection level and any authentication errors would
  be raised there, before a Result is ever created.

@example Validate the result.

  result.validate!

@raise [ Error::OperationFailure ] If an error is in the result.

@return [ Result ] The result if verification passed.

@since 2.0.0