public Set<String> getOrgQualifiers(PermissionType permissionName) {
        Set<String> orgs = permissionToOrgsMap.get(permissionName);
        if (orgs == null)
            orgs = Collections.emptySet();
        return Collections.unmodifiableSet(orgs);
    }
Given a permission name, returns all organization qualifiers.
@param permissionName the permission type
@return set of org qualifiers
manager/api/security/src/main/java/io/apiman/manager/api/security/impl/IndexedPermissions.java