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5 changes: 4 additions & 1 deletion workflow.rst
Original file line number Diff line number Diff line change
Expand Up @@ -194,7 +194,10 @@ The configured property will be used via its implemented getter/setter methods b
preferable to not configure it.

A single state marking store uses a ``string`` to store the data. A multiple
state marking store uses an ``array`` to store the data.
state marking store uses an ``array`` to store the data. On both cases if no
state marking store is defined you have to return ``null``. So in the above
example should be defined a return type like ``App\Entity\BlogPost::getCurrentPlace(): ?array``
or like ``App\Entity\BlogPost::getCurrentPlace(): ?string``.

.. tip::

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