public void setProperties(Map<String, String> properties) {
      this.properties.clear();
      if(properties != null) {
        this.properties.putAll(properties);
      }
    }
Returns a map of properties for this configuration.
<p/>
It is expected that a non-null value is always returned.

@param properties a map of properties, always non-null
ambari-server/src/main/java/org/apache/ambari/server/api/services/stackadvisor/recommendations/RecommendationResponse.java