if (!m_identities) return NS_ERROR_UNEXPECTED;
NS_ASSERTION(m_identities,"you never called Init()"); if (!m_identities) return NS_ERROR_FAILURE;
nsMsgAccount::GetIdentities(nsISupportsArray **_retval){  if (!_retval) return NS_ERROR_NULL_POINTER;  if (!m_identities) return NS_ERROR_UNEXPECTED;    *_retval = m_identities;  NS_ADDREF(*_retval);  return NS_OK;}