Применимость аннотации на методе/конструкторе/поле

@Target({ElementType.METHOD})
Какой-нибудь

И проверять при разворачивании аннотации, в методе Проверить() у определения аннотации.

Start with the annotation definition and its Проверить() method, which the issue identifies as the validation entry point. Trace how annotations are expanded and determine how method, constructor, and field targets are represented there. Done means unsupported targets are rejected consistently according to the declared @Target applicability, with coverage for the relevant cases.

Written by the indexing model from the issue text.