code: func (db *DB) QueryRowxContext(ctx context.Context, query string, args ...interface{}) *Row {
  	rows, err := db.DB.QueryContext(ctx, query, args...)
  	return &Row{rows: rows, err: err, unsafe: db.unsafe, Mapper: db.Mapper}
  }
docs: // QueryRowxContext queries the database and returns an *sqlx.Row.
  // Any placeholder parameters are replaced with supplied args.