static final UsingToStringOrdering INSTANCE = new UsingToStringOrdering();

  @Override
  public int compare(Object left, Object right) {
    return left.toString().compareTo(right.toString());
  }

  // preserve singleton-ness, so equals() and hashCode() work correctly
  private Object readResolve() {
    return INSTANCE;
  }

  @Override
  public String toString() {

 *   <li>{@link RangeSet}
 *   <li>{@link DiscreteDomain}
 *   <li>{@link ContiguousSet}
 * </ul>
 *
 * <h2>Classes of static utility methods</h2>
 *
 * <ul>
 *   <li>{@link Collections2}
 *   <li>{@link Comparators}
 *   <li>{@link Iterables}
 *   <li>{@link Iterators}
 *   <li>{@link Lists}
 *   <li>{@link Maps}
 *   <li>{@link MoreCollectors}
 *   <li>{@link Multimaps}
 *   <li>{@link Multisets}

    }

    private boolean hasErrors(List<SettingsProblem> problems) {
        if (problems != null) {
            for (SettingsProblem problem : problems) {
                if (SettingsProblem.Severity.ERROR.compareTo(problem.getSeverity()) >= 0) {
                    return true;
                }
            }
        }

        return false;
    }

            throw new IllegalStateException("Could not parse current Java version", e);
        }
        if (constraint.getRange() == null) {
            return constraint.getVersion().compareTo(current) <= 0;
        }
        return constraint.containsVersion(current);
    }

            throw new IllegalStateException("Could not parse current Maven version: " + e.getMessage(), e);
        }

        if (constraint.getRange() == null) {
            return constraint.getVersion().compareTo(current) <= 0;
        }
        return constraint.containsVersion(current);
    }

    @Override
    public String toString() {
      return rootLocaleFormat("%s%s(%s)", typeSignature, name, getTypesString(parameterTypes));
    }

    @Override
    public int compareTo(MethodSignature o) {
      return toString().compareTo(o.toString());
    }
  }

  private static final class TypeSignature {
    final List<TypeParameterSignature> parameterSignatures;

    @Override
    public String toString() {
      return rootLocaleFormat("%s%s(%s)", typeSignature, name, getTypesString(parameterTypes));
    }

    @Override
    public int compareTo(MethodSignature o) {
      return toString().compareTo(o.toString());
    }
  }

  private static final class TypeSignature {
    final List<TypeParameterSignature> parameterSignatures;

      return state().compareTo(RUNNING) >= 0;
    }
  }

  private final Guard isStopped = new IsStoppedGuard();

  @WeakOuter
  private final class IsStoppedGuard extends Guard {
    IsStoppedGuard() {
      super(AbstractService.this.monitor);
    }

    @Override
    public boolean isSatisfied() {
      return state().compareTo(TERMINATED) >= 0;
    }
  }

                if (range.hasRestrictions()) {
                    return range.containsVersion(version);
                } else {
                    return range.getRecommendedVersion().compareTo(version) == 0;
                }
            } catch (InvalidVersionSpecificationException ex) {
                return false;
            }
        }

        @Override
        public String toString() {

    /** {@inheritDoc} */
    @Override
    public boolean isSnapshot() {
        return artifact.isSnapshot();
    }

    /** {@inheritDoc} */
    @Override
    public int compareTo(Artifact a) {
        return artifact.compareTo(a);
    }

    /** {@inheritDoc} */
    @Override
    public void setResolved(boolean resolved) {
        artifact.setResolved(resolved);
    }

    /** {@inheritDoc} */