code: public UpdateFlowEntitlementRequest withSubscribers(String... subscribers) {
          if (this.subscribers == null) {
              setSubscribers(new java.util.ArrayList<String>(subscribers.length));
          }
          for (String ele : subscribers) {
              this.subscribers.add(ele);
          }
          return this;
      }
docs: The AWS account IDs that you want to share your content with. The receiving accounts (subscribers) will be
  allowed to create their own flow using your content as the source.
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setSubscribers(java.util.Collection)} or {@link #withSubscribers(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param subscribers
  The AWS account IDs that you want to share your content with. The receiving accounts (subscribers) will be
  allowed to create their own flow using your content as the source.
  @return Returns a reference to this object so that method calls can be chained together.