@Override
  public String toString() {
    return "closed=" + isClosed
        + "; hostMembers=" + hostMembers
        + "; okayHealth=" + okayHealth
        + "; poorHealth=" + poorHealth
        + "; overallHealth=" + overallHealth
        + "; diagnosis=" + getDiagnosis();
  }
Creates a new <code>GemFireHealthImpl</code> that monitors the health of member of the given
distributed system.
geode-core/src/main/java/org/apache/geode/admin/internal/GemFireHealthImpl.java