code: public DescribeCustomerGatewaysRequest withCustomerGatewayIds(String... customerGatewayIds) {
          if (this.customerGatewayIds == null) {
              setCustomerGatewayIds(new com.amazonaws.internal.SdkInternalList<String>(customerGatewayIds.length));
          }
          for (String ele : customerGatewayIds) {
              this.customerGatewayIds.add(ele);
          }
          return this;
      }
docs: <p>
  One or more customer gateway IDs.
  </p>
  <p>
  Default: Describes all your customer gateways.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setCustomerGatewayIds(java.util.Collection)} or {@link #withCustomerGatewayIds(java.util.Collection)} if
  you want to override the existing values.
  </p>
  
  @param customerGatewayIds
  One or more customer gateway IDs.</p>
  <p>
  Default: Describes all your customer gateways.
  @return Returns a reference to this object so that method calls can be chained together.