List<Book> findByAuthor(String author) {
		Book[] books = { new Book("1", "title1", "author1") };
		return Arrays.asList(books);
	}
Find by author list.

@param author the author
@return the list
springdoc-openapi-tests/springdoc-openapi-javadoc-tests/src/test/java/test/org/springdoc/api/v30/app141/BookRepository.java