Function meeting 

pub(crate) fn meeting(
    template: &Bound<'_, PyAny>,
    valuation: NaiveDate,
    locator: &Bound<'_, PyAny>,
    rate: f64,
    notional: f64,
    schedule: Option<PyRef<'_, PyMeetingSchedule>>,
) -> PyResult<PyRung>

A meeting rung: the meeting-dated swap locator names at rate, noded at the window’s end (where its accrual ends, not where it pays: the knot is the decision), its pillar carrying the deciding meeting so the solved curve is a step curve and risk reads per decision; labelled by bank and meeting date (FED 2026-12-09).