async function getEventsHandler(serverId, callback) {
  const entries = await database.query(serverId);
  callback(entries);
}
Handler for a getEvents message. Query the database for events since the
last serverId.
@param {number} serverId serverId for the lower bound of the query.
@param {!Function} callback The callback passed in by WorkspaceClient to
receive acknowledgement of the success of the write.
@private