public final class LicenseRoleId
License roles are a hierarchical typing mechanism for users of a license.
Licenses in JIRA 6.3 and earlier effectively have a single "license role" --
all JIRA users counted equally toward the user limit of the license.
In JIRA 7.0 and later, licenses are granted in terms of license roles
which take the place of licenses in determining the number of users that may
access any given product.