Thank you @smnandre.

@fabpot

Do we need or plan to do it for all missing return types in the Twig 4.x codebase ?

There is still a lot of them (with or without @return tags)

Examples:

• TemplateWrapper:unwrap (@private)
• ExpressionParser::parseArrow (private)
• ExpressionParser::parseStringExpression (public)
• Template::renderParentBlock() (@internal)
• Environment::getCache() (public)

I suppose we can start with everything private (arg and return types), maybe everything @internal as well?

@fabpot started this here #4218

Most of concerned methods are in fact public or protected :|