public String getDomain() {
        return domain;
    }
Return the value of the domain as extracted from the vault field.
If this is null, it means that no domain was found in the vault field.

@return
    The domain value as extracted from the vault field.
extensions/guacamole-vault/modules/guacamole-vault-base/src/main/java/org/apache/guacamole/vault/secret/WindowsUsername.java