Supported annotations:
@Mod: Checks that the class applied to is public, non-abstract, and has a no parameter public constructor. If it is an inner class, checks that it is static.
@EventHandler: Checks that the method is public, non-static, returns void, takes one parameter assignable to FMLEvent, and its owner is annotated with @Mod.
@Instance: Checks that field is public, static, non-final, of the correct type, and that its owner is annotated with @Mod.
@Metadata: Checks that the field is public, non-static, non-final, and is of type ModMetadata.
@InstanceFactory: Checks for empty parameters and returns containing class, that it's in a @Mod annotated class, and that there are no other @InstanceFactory methods in the class.
@SidedProxy: Checks that a field is public, static, non-final, that the specified classes are assignable to the type, each proxy class has a no parameter public constructor, and its owner is annotated with @Mod .
@SubscribeEvent: Checks that the method is public, non-static, returns void, and takes one parameter extending Event.
@Cancelable: Checks that the type applied to is an Event.
@HasResult: Checks that the type applied to is an Event.
@NetworkCheckHandler: Checks that the method applied to returns boolean and takes parameters String and Side