RevisionVector implements Iterable<Revision>, Comparable<RevisionVector>, CacheValue { public int getDimensions() { return revisions.length; } private  RevisionVector(@NotNull Revision[] revisions,
                           boolean checkUniqueClusterIds,
                           boolean sort);  RevisionVector(@NotNull Revision... revisions);  RevisionVector(@NotNull Iterable<Revision> revisions);  RevisionVector(@NotNull Set<Revision> revisions); RevisionVector update(@NotNull Revision revision); RevisionVector remove(int clusterId); RevisionVector pmin(@NotNull RevisionVector vector); RevisionVector pmax(@NotNull RevisionVector vector); RevisionVector difference(RevisionVector vector); boolean isRevisionNewer(@NotNull Revision revision); boolean isBranch(); @NotNull Revision getBranchRevision(); Revision getRevision(int clusterId); String asString(); StringBuilder toStringBuilder(StringBuilder sb); static RevisionVector fromString(String s); RevisionVector asTrunkRevision(); RevisionVector asBranchRevision(int clusterId); int getDimensions(); @Override int getMemory(); @Override int compareTo(@NotNull RevisionVector other); @Override Iterator<Revision> iterator(); @Override String toString(); @Override boolean equals(Object o); @Override int hashCode();  }
@Test public void getDimensions() throws Exception { RevisionVector rv = new RevisionVector(); assertEquals(0, rv.getDimensions()); rv = new RevisionVector( new Revision(1, 0, 1), new Revision(2, 0, 2) ); assertEquals(2, rv.getDimensions()); rv = rv.remove(1); assertEquals(1, rv.getDimensions()); }