Deprecated. Replaced by documenting never as a return type. It is going to be removed in Psalm 5. Deprecated. Has no effect since Psalm 3 and is going to be removed in Psalm 5. Deprecated. PHPStorm now supports generics for the most part and @psalm- annotations can be used Deprecated. Will be replaced by adding echo to forbiddenFunctions in Psalm 5. Default is runtime-specific: if not present, Psalm will only load the Xdebug stub if psalm has unloaded the extension.