It seems like \h4kuna\Fio\Account\Bank::createNational($account) of type object<self> is incompatible with the declared type object<h4kuna\Fio\Account\Bank> of property $account.
Our type inference engine has found an assignment to a property that is incompatible
with the declared type of that property.
Either this assignment is in error or the assigned type should be added
to the documentation/type hint for that property..
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..