return (PL_strchr(messageIdString,',') != nsnull || PL_strchr(messageIdString,':') != nsnull);
return (messageIdString.FindCharInSet(",:") != -1);
/* static */PRBool nsImapProtocol::HandlingMultipleMessages(const char *messageIdString){  return (PL_strchr(messageIdString,',') != nsnull ||        PL_strchr(messageIdString,':') != nsnull);}