Function pulsify

pub fn pulsify(
    _op: &TypedSource,
    _source: &TypedModel,
    node: &TypedNode,
    target: &mut PulsedModel,
    _mapping: &HashMap<OutletId, OutletId>,
    stream_symbol: &Symbol,
    pulse: &TDim,
) -> TractResult<Option<TVec<OutletId>>>