writePointMember(node, point, objectStack) {
    const child = createElementNS(node.namespaceURI, 'Point');
    node.appendChild(child);
    this.writePoint(child, point, objectStack);
  }
@param {Element} node Node.
@param {import("../geom/Point.js").default} point Point geometry.
@param {Array<*>} objectStack Node stack.