code: public void setStagesAvailable(java.util.Collection<String> stagesAvailable) {
          if (stagesAvailable == null) {
              this.stagesAvailable = null;
              return;
          }
  
          this.stagesAvailable = new com.amazonaws.internal.SdkInternalList<String>(stagesAvailable);
      }
docs: <p>
  The stage of the template that you can retrieve. For stacks, the <code>Original</code> and <code>Processed</code>
  templates are always available. For change sets, the <code>Original</code> template is always available. After
  AWS CloudFormation finishes creating the change set, the <code>Processed</code> template becomes available.
  </p>
  
  @param stagesAvailable
  The stage of the template that you can retrieve. For stacks, the <code>Original</code> and
  <code>Processed</code> templates are always available. For change sets, the <code>Original</code> template
  is always available. After AWS CloudFormation finishes creating the change set, the <code>Processed</code>
  template becomes available.
  @see TemplateStage