@Override
  public void setVerifyChecksum(boolean verifyChecksum) {
    fs.setVerifyChecksum(verifyChecksum);
  }
@Test
  public void testVerifyChecksumPassthru() {
    FileSystem mockFs = mock(FileSystem.class);
    FileSystem fs = new FilterFileSystem(mockFs);

    fs.setVerifyChecksum(false);
    verify(mockFs).setVerifyChecksum(eq(false));
    reset(mockFs);
    fs.setVerifyChecksum(true);
    verify(mockFs).setVerifyChecksum(eq(true));
  }