return isAutoAttendantNameOrExtensionInUse(alias) || isAutoAttendantAliasInUse(alias) || isVoiceMailExtensionInUse(alias);
if (getAutoAttendantsWithName(alias).size() > 0) {   return true; } if (getInternalRulesWithVoiceMailExtension(alias).size() > 0) { return true; } if (getAttendantRulesWithExtension(alias).size() > 0) { return true; } return isAutoAttendantAliasInUse(alias);
    public boolean isAliasInUse(String alias) {        return isAutoAttendantNameOrExtensionInUse(alias) || isAutoAttendantAliasInUse(alias)                || isVoiceMailExtensionInUse(alias);    }