@Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }

    if (!super.equals(obj)) {
      return false;
    }

    if (getClass() != obj.getClass()) {
      return false;
    }

    PercentSource other = (PercentSource) obj;
    return Objects.equals(m_denominator, other.m_denominator) &&
      Objects.equals(m_numerator, other.m_numerator);
  }
Gets the denomintor for the percent calculation.

@return a metric value representing the denominator (never {@code null}).
ambari-server/src/main/java/org/apache/ambari/server/state/alert/PercentSource.java