code: func (st *Store) MaxLength(l int) {
  	for _, c := range st.Codecs {
  		if codec, ok := c.(*securecookie.SecureCookie); ok {
  			codec.MaxLength(l)
  		}
  	}
  }
docs: // MaxLength restricts the maximum length of new sessions to l.
  // If l is 0 there is no limit to the size of a session, use with caution.
  // The default is 4096 (default for securecookie)