Can Vural

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The mutations look valid, but I don't know how I can change them in bulk. Edit: I guess `$type instanceof ErrorType` could be `!$type->isError()->no()` and `!$type instanceof ErrorType` can be...

> In #4547 > > ``` > $expressionType instanceof NeverType > ``` > > by > > ``` > !$expressionType->isNever()->no() > ``` > > But here you're replacing > >...