document streaming

[aniketmaurya]

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• Did you write any new necessary tests?

What does this PR do?

Fixes # (issue).

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82%. Comparing base (9f8f4e5) to head (3d2fac5).

Additional details and impacted files

@@        Coverage Diff         @@
##           main   #49   +/-   ##
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  Coverage    82%   82%           
==================================
  Files         6     6           
  Lines       439   439           
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  Hits        361   361           
  Misses       78    78           

[lantiga]

Added a comment. We also need to mention (in an advanced section) that batching supports streaming, and if you need a custom batch/unbatch implementation, that should also yield.

[williamFalcon]

reduce the imports by following my guide

[lantiga]

LGTM