code: public void setSeverityLevels(java.util.Collection<SeverityLevel> severityLevels) {
          if (severityLevels == null) {
              this.severityLevels = null;
              return;
          }
  
          this.severityLevels = new com.amazonaws.internal.SdkInternalList<SeverityLevel>(severityLevels);
      }
docs: <p>
  The available severity levels for the support case. Available severity levels are defined by your service level
  agreement with AWS.
  </p>
  
  @param severityLevels
  The available severity levels for the support case. Available severity levels are defined by your service
  level agreement with AWS.