code: public CreateApiKeyResult withStageKeys(String... stageKeys) {
          if (this.stageKeys == null) {
              setStageKeys(new java.util.ArrayList<String>(stageKeys.length));
          }
          for (String ele : stageKeys) {
              this.stageKeys.add(ele);
          }
          return this;
      }
docs: <p>
  A list of <a>Stage</a> resources that are associated with the <a>ApiKey</a> resource.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setStageKeys(java.util.Collection)} or {@link #withStageKeys(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param stageKeys
  A list of <a>Stage</a> resources that are associated with the <a>ApiKey</a> resource.
  @return Returns a reference to this object so that method calls can be chained together.