code: async function findRoleUsers (roleId, roleMembershipModel, rbac) {
    const userIds = [ ]
    for (const inheritedRoleId of rbac.inheritedBy[roleId]) {
      userIds.push(...await findUserIds(inheritedRoleId, roleMembershipModel))
    } // for ...
  
    return uniqify(userIds)
  }
docs: findRoleIds / //////