[10.x] Fix enums uses with optional implicit parameters #46483
Merged
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Fixes the bug outlined in #46471.
Essentially this boils down to the use string typecasting when checking if you had type-hinted your controller method to expect an optional enum parameter which defaulted to null in the controller class.
The issue is only relevant for the cases where the parameter is defined as an optional parameter in the controller and uses implicit routing.