### Question:
LenskitInfo { public static boolean includesRevision(String revision) { return getRevisions().contains(revision); } private  LenskitInfo(); @Nonnull static synchronized Set<String> getRevisions(); static boolean includesRevision(String revision); @Nonnull static String getHeadRevision(); @Nonnull static String lenskitVersion();  }### Answer:
@Test public void testIncludesRevision() throws Exception { assertThat(LenskitInfo.includesRevision("9103068a95fc650f9f4670683308819366e9d03b"), equalTo(true)); }