@Test
public void testConvertPathToClass1() throws Exception {

  File f =
      new File(project.getProjectRootPath(), "./src/main/java/meghanada/session/Session.java")
          .getCanonicalFile();
  try {
    Optional<String> s = FileUtils.convertPathToClass(project.getAllSources(), f);
    log.info("{}", s);
  } catch (IOException e) {
    log.catching(e);
  }
}