Make OCP\Federation strict
* Also internal classes
* Added scalar typehints
* Added return type
* Made strict
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
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* Also internal classes
* Added scalar typehints
* Added return type
* Made strict
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>