public static @Nullable TextRange getPossibleDeclarationAtRange(@NotNull PsiElement container) {
    for (MixinEP<DeclarationRangeHandler<PsiElement>> ep: EP_NAME.getIterable()) {
      if (ep.getKey().isInstance(container)) {
        return ep.getInstance().getDeclarationRange(container);
      }
    }
    return null;
  }
public static @Nullable TextRange getPossibleDeclarationAtRange(@NotNull PsiElement container)