readFlatCoordinatesFromNode(node, objectStack) {
    return pushParseAndPop(
      null,
      this.GEOMETRY_FLAT_COORDINATES_PARSERS,
      node,
      objectStack,
      this,
    );
  }
@param {Element} node Node.
@param {Array<*>} objectStack Object stack.
@return {Array<number>} Flat coordinates.