* Add type hints where possible.
* Add initialization values to properties where needed.
* Remove @var block if redundant to type declaration.
* Use single line /** @var type $var */ instead of multi line.
* Add improvements to avoid Phan warnings.
Change-Id: I8e391700dcbfbbcc88cceb589dc3a36fb8e3b357
Services MUST NOT vary their behaviour on global state, especially not
WebRequest, RequestContext (T218555).
Change-Id: I4b73ef713166d8b254023c1eebbb45c963880a99
Changes to the use statements done automatically via script
Addition of missing use statement done manually
Change-Id: I1eec0823b7af97ea5031ff00b111e0c88b45a155
The $hasLangauges and $hasVariants checks were used in couple places,
which lead to the same code used in many places.
Following the DRY rule, let's implement a Service that can do that
check, and use that service everywhere in code.
Bug: T224735
Change-Id: I46d58758356e870c408a74b2c087a42d6ad0ddea
