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PASS Check if post hook can returned modified clone_object.phpt]
----DESCRIPTION--
A different object might be returned than the one provided to post hook. For example, PSR-7 messages are immutable and modifying
one creates a new instance. [tests/post_hook_returns_cloned_modified_object.phpt] 
PASS Check if throwing an exception in post hook after IO operation will finish gracefully [tests/post_hook_throws_exception.phpt] 
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