@Test
public void testBuilderCopies() {

    final B2ListUnfinishedLargeFilesRequest original =
            new B2ListUnfinishedLargeFilesRequest(
                    "bucketId",
                    "namePrefix",
                    "startFileId",
                    123
            );
    assertEquals(
            original,
            B2ListUnfinishedLargeFilesRequest.builder(original).build()
    );
}