public boolean isUsernameMuted(final String username){
  final long muteTill=getUsernameUnmuteTime(username);
  return muteTill > System.currentTimeMillis();
}

public boolean isUsernameMuted ( final String username ) { final long muteTill = getUsernameUnmuteTime ( username ) ; return muteTill > System . currentTimeMillis ( ) ; }
is the given username muted ? this may have the side effect of removing from the database any username ' s whose mute has expired
