registerSwaigFunction
Register a pre-built SwaigFunction instance or a raw function descriptor (e.g.,
from a DataMap) on a SWMLService. Unlike
defineTool(), this method accepts pre-built objects rather than
taking a handler callback.
Parameters
fn
A SwaigFunction instance or a plain object with a "function" key.
Typically generated by DataMap.toSwaigFunction().
Returns
SWMLService — Returns this for method chaining.