Function erase_neuron 

pub fn erase_neuron<T, C>(
    neuron: Arc<dyn Neuron<T, C> + Send + Sync + 'static>,
) -> Arc<dyn NeuronErased + Send + Sync + 'static>
where
    T: Send + Sync + 'static,
    C: Codec<T> + CodecName + Send + Sync + 'static,

Convenience function to create a type-erased neuron from a correctly typed neuron