code: public void setStageKeys(java.util.Collection<StageKey> stageKeys) {
          if (stageKeys == null) {
              this.stageKeys = null;
              return;
          }
  
          this.stageKeys = new java.util.ArrayList<StageKey>(stageKeys);
      }
docs: <p>
  DEPRECATED FOR USAGE PLANS - Specifies stages associated with the API key.
  </p>
  
  @param stageKeys
  DEPRECATED FOR USAGE PLANS - Specifies stages associated with the API key.