Trying to add new functions to be supported by a new connector and the Connector developers guide refers to the JDBCCapabilities class, which doesn't exist anymore. Have the steps changed to add a new scalar function?

Referring to the Connectors Developers Guide when trying to adding new scalar functions, but the first step says to: Modify the capabilities class to declare support for the function (REQUIRED) and the example shows the JDBCCapabilities class being extended. I don't think the steps are correct.