public Expression VisitField([NotNull] FieldExpression fieldExpression)
        {
            Check.NotNull(fieldExpression, nameof(fieldExpression));

            _bsonCommandBuilder.AddField(fieldExpression.Name);

            return(fieldExpression);
        }
 public Expression VisitField(FieldExpression fieldExpression)
 {
     _bsonCommandBuilder.AddField(fieldExpression.Name);
     return(fieldExpression);
 }