Method register_udwf

datafusion/core/src/execution/session_state.rs:2165–2174

(
        &mut self,
        udwf: Arc<WindowUDF>,
    )

    }

    fn register_udwf(
        &mut self,
        udwf: Arc<WindowUDF>,
    ) -> datafusion_common::Result<Option<Arc<WindowUDF>>> {
        udwf.aliases().iter().for_each(|alias| {
            self.window_functions
                .insert(alias.clone(), Arc::clone(&udwf));
        });
        Ok(self.window_functions.insert(udwf.name().into(), udwf))
    }

    fn deregister_udf(
        &mut self,