code: function collationNotSupported(server, cmd) {
    return cmd && cmd.collation && server.ismaster && server.ismaster.maxWireVersion < 5;
  }
docs: /*
  Checks that collation is supported by server.
  
  @param {Server} [server] to check against
  @param {object} [cmd] object where collation may be specified
  @param {function} [callback] callback function
  @return true if server does not support collation