void visitXCollection(@NotNull PsiField field,
                          @Nullable @NonNls String tagName,
                          @NotNull PsiAnnotation collectionAnnotation,
                          RequiredFlag required);
void visitXCollection(@NotNull PsiField field,
                          @Nullable @NonNls String tagName,
                          @NotNull PsiAnnotation collectionAnnotation,
                          RequiredFlag required)