There are several use-cases which require the usage of a custom ILcdOWSTransport. For example:

Configuring the custom transport on the model decoder

When you want to visualize WFS data on a map, you first use the WFS model decoder to create an ILcdModel, as illustrated in Visualize WFS data on a Lightspeed map tutorial.

You can pass the custom transport to the constructor of the model decoder, and the model decoder will use this transport: 

TLcdWFSModelDecoderDecorator modelDecoder = new TLcdWFSModelDecoderDecorator(customTransport);

Configuring the custom transport on the TLcdWFSClient

When you want to send your own WFS requests to the server, you use the TLcdWFSClient directly. Creating a client which uses a custom transport is done by passing the transport to the factory method: 

TLcdWFSClient client = TLcdWFSClient.createWFSClient(serverURI, customTransport, null);