This is a debug node, it dumps in the console a platform compatibility chart for message types.

Extend node can also declares additional platforms and message types with

node.chat.registerPlatform('dialog', 'Dialog');
node.chat.registerMessageType('message');
node.chat.registerMessageType('photo');
node.chat.registerMessageType('inline-buttons');

These lines of codes have also the effect to update the transport and message type dropdowns in the Rules node