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    Type:Task 
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    Resolution: Done
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    Priority:L3 - Default 
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    Affects Version/s: None
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    Component/s: documentation
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    None
Improve the Message Correlation Rest API documentation for Business Keys.
Given:
The businessKey parameter for the POST /message endpoint is set, 
When:
The correlation triggers a Start Event.
Then:
As a user, I can read in the Rest API docs that the businessKey property will be set on the newly started Process Instance.