@JsonProperty("type")
  public ReportingType getType() {
    return m_type;
  }
Sets the label that identifies the units that the threshold values are in.
For example, this could be "s" for seconds or GB for "Gigabytes".

@param units
         the units, or {@code null} for none.
ambari-server/src/main/java/org/apache/ambari/server/state/alert/Reporting.java