invoke

operator fun invoke(    param0: <Error class: unknown class>,     param1: <Error class: unknown class>,     param2: <Error class: unknown class>,     param3: <Error class: unknown class>,     param4: <Error class: unknown class>,     param5: <Error class: unknown class>): <Error class: unknown class>

Calls the functions.callUDF for the UDF with the udfName and the given columns.