code: public ModifyVpcEndpointRequest withAddRouteTableIds(String... addRouteTableIds) {
          if (this.addRouteTableIds == null) {
              setAddRouteTableIds(new com.amazonaws.internal.SdkInternalList<String>(addRouteTableIds.length));
          }
          for (String ele : addRouteTableIds) {
              this.addRouteTableIds.add(ele);
          }
          return this;
      }
docs: <p>
  (Gateway endpoint) One or more route tables IDs to associate with the endpoint.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setAddRouteTableIds(java.util.Collection)} or {@link #withAddRouteTableIds(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param addRouteTableIds
  (Gateway endpoint) One or more route tables IDs to associate with the endpoint.
  @return Returns a reference to this object so that method calls can be chained together.