docs: function performParallel(pool, queries, callback) {
    let count   = 0,
        results = new Array(queries.length);
  
    queries.forEach((query, index) => {
      pool.query(query, (error, result) => {
        if (error) {
          return callback(error, results);
        }
  
        results[index] = result;
  
        if (++count === queries.length) {
          return callback(null, results);
        }
      });
    });
  }