Method begin

valdi/src/valdi/runtime/Context/ViewNode.cpp:2994–2996

        refreshPreserveAnchor(this, scrollState, offsetY, viewportH);
    }

    // Sticky headers: refresh per-child measurement cache from the current layout, then
    // reposition. Called on every layout pass to survive content-size changes (section
    // expand/collapse, rotation, keyboard, initial mount).
    updateStickyHeaders(/*refreshCache=*/true);