;    const modifier = {     $set: {       whiteboardId,       meetingId,       id,       status,       annotationType,       annotationInfo,       wbId,     },     $setOnInsert: {       position,     },     $inc: { version: 0 },   };    return { selector, modifier }; }  function handlePencilUpdate(meetingId, whiteboardId, userId, annotation) {   const 