How does guzzle async work?

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Tags

1. #receives
2. #functions
3. #launched
4. #requests
5. #transport
6. #function
7. #answers
8. #process
9. #multi
10. #select
11. #until
12. #which
13. #asynchronously
14. #handlers
15. #transfers
16. #allows
17. #curlmultihandler
18. #asynchronous
19. #guzzle