227 function fill_occlusion_state(layerMap, rootLayers, includesCompositionState) {  argument
229 …traverse_top_to_bottom(layerMap, layers, {opaqueRects:[], transparentRects:[], screenBounds:null},…
259 function traverse_top_to_bottom(layerMap, rootLayers, globalState, fn) {  argument
261     const relatives = rootLayers[i].relatives.map(id => layerMap[id]);
262     const children = rootLayers[i].children.map(id => layerMap[id])
269       traverse_top_to_bottom(layerMap, [layer], globalState, fn);
275       traverse_top_to_bottom(layerMap, [layer], globalState, fn);
282 function fill_inherited_state(layerMap, rootLayers) {  argument
283   traverse(layerMap, rootLayers, (layer, parent) => {
300 function traverse(layerMap, rootLayers, fn) {  argument
303     const parent = parentId == -1 ? null : layerMap[parentId];
305     const children = rootLayers[i].children.map(id => layerMap[id]);
306     traverse(layerMap, children, fn);