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