[standalone@localhost:9999 /] /subsystem=mail/mail-session=*:read-resource-description
{
    "outcome" => "failed",
    "result" => [{
        "address" => [
            ("subsystem" => "mail"),
            ("mail-session" => "*")
        ],
        "outcome" => "failed",
        "failure-description" => "JBAS014749: Operation handler failed: Can't find resource for bundle java.util.PropertyResourceBundle, key mail.mail-session.debug",
        "rolled-back" => true
    }],
    "rolled-back" => true
}
[standalone@localhost:9999 /] cd subsystem=mail
[standalone@localhost:9999 subsystem=mail] :read-children-names(child-type=mail-session)
{
    "outcome" => "success",
    "result" => ["java:jboss/mail/Default"]
}
[standalone@localhost:9999 subsystem=mail] cd mail-session=java\:jboss\/mail\/Default
[standalone@localhost:9999 mail-session=java:jboss/mail/Default] :read-resource-description
{
    "outcome" => "failed",
    "failure-description" => "JBAS014749: Operation handler failed: Can't find resource for bundle java.util.PropertyResourceBundle, key mail.mail-session.debug",
    "rolled-back" => true
}
[standalone@localhost:9999 mail-session=java:jboss/mail/Default]