**⚠️ This API is released as preview.**
This function enables fetching only the first record in the Result.
If any other record is present, it will be discarded and network optimization might be applied.
Examples:
```javascript
// using in the execute query
const maybeFirstRecord = await driver.executeQuery('MATCH (p:Person{ age: $age }) RETURN p.name as name', { age: 25 }, {
    database: 'neo4j,
    resultTransformer: neo4j.resultTransformers.first()
})
```
```javascript
// using in other a result
const maybeFirstRecord = await session.executeRead(tx => {
    // do not `await` or `resolve` the result before send it to the transformer
    const result = tx.run('MATCH (p:Person{ age: $age }) RETURN p.name as name', { age: 25 })
    return  neo4j.resultTransformers.first()(result)
})
```
**⚠️ This API is released as preview.**