Consider making `Roave\BetterReflection\Reflection\ReflectionClass#getMethod()` non-nullable?

[Ocramius]

We currently have:

• Roave\BetterReflection\Reflection\ReflectionClass#getMethod(): ReflectionMethod|null
• Roave\BetterReflection\Reflection\ReflectionClass#hasMethod(): bool

This API is kinda dumb-ish, and we kinda went back on it in 6.0.0, IMO: an exception being thrown was probably a much nicer API here.

Either we make getMethod() throw, or we remove hasMethod() here. Relying on getMethod() throwing is not so bad here, but either way could work.

[kukulich]

We should make getProperty() etc use the same pattern to be consistent.

[staabm]

in case you don't want todo another major in the near future I think you could also use phpdoc to narrow the return type in the meantime.

phpstan does a similar thing with phpstan/phpstan-src@ace76ce

its a pretty recent feature in phpstan though

[Ocramius]

@staabm a new major would be OK here, IMO.

We aren't that worried about BC, on a codebase that provides full type safety (and therefore is easy yo upgrade to)