Mesh not importing in the center of scene

Questions
5

Here’s a function to center mesh content in a node:

    function centerMeshContent(node: TransformNode) {
        const { min, max } = node.getHierarchyBoundingVectors();
        const halfRange = max.subtract(min).scaleInPlace(0.5);
        const currentCenter = min.add(halfRange);
        const offset = currentCenter.negate();

        traverseNodes(node, (n) => {
            if (n instanceof Mesh) {
                n.position.addInPlace(offset);

                // The bounding box is world-based, so re-adjust back into local space.
                n.position.addInPlace(node.getAbsolutePosition());
            }
        });
    }

    function traverseNodes(node: Node | Scene, visit: (node: Node) => void) {
        const children = node instanceof Node ? node.getChildren() : node.rootNodes;

        for (const child of children) {
            visit(child);
            traverseNodes(child, visit);
        }
    }