MAGIC

void PhysicsProcessorPrivate::setTerrainLayer(cocos2d::TMXLayer *const layer) {
    m_terrainLayer = layer;

    if (layer) {
        const auto tileSet = layer->getTileSet();

        if (tileSet) {
            auto sourceImageName = tileSet->_sourceImage;

            if (!sourceImageName.empty()) {
                auto descriptionFileName = sourceImageName + ".collisions.xml";
                loadCollisionsDescription(descriptionFileName);
            }
        }
    }
}

/** Далее - cocos2d::TMXLayer::getTileSet() **/
TMXTilesetInfo* getTileSet() const { return _tileSet; }