code: public PushSync withApplicationArns(String... applicationArns) {
          if (this.applicationArns == null) {
              setApplicationArns(new com.amazonaws.internal.SdkInternalList<String>(applicationArns.length));
          }
          for (String ele : applicationArns) {
              this.applicationArns.add(ele);
          }
          return this;
      }
docs: <p>
  List of SNS platform application ARNs that could be used by clients.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setApplicationArns(java.util.Collection)} or {@link #withApplicationArns(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param applicationArns
  List of SNS platform application ARNs that could be used by clients.
  @return Returns a reference to this object so that method calls can be chained together.