code: public CorsRule withExposeHeaders(String... exposeHeaders) {
          if (this.exposeHeaders == null) {
              setExposeHeaders(new java.util.ArrayList<String>(exposeHeaders.length));
          }
          for (String ele : exposeHeaders) {
              this.exposeHeaders.add(ele);
          }
          return this;
      }
docs: <p>
  One or more headers in the response that you want users to be able to access from their applications (for
  example, from a JavaScript <code>XMLHttpRequest</code> object).
  </p>
  <p>
  This element is optional for each rule.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setExposeHeaders(java.util.Collection)} or {@link #withExposeHeaders(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param exposeHeaders
  One or more headers in the response that you want users to be able to access from their applications (for
  example, from a JavaScript <code>XMLHttpRequest</code> object).</p>
  <p>
  This element is optional for each rule.
  @return Returns a reference to this object so that method calls can be chained together.