@Override
    public String toString() {
        return new StringJoiner(", ", PermissionConstraint.class.getSimpleName() + "[", "]")
                .add("constrained=" + constrained)
                .add("permittedOrgs=" + permittedOrgs)
                .add("permissionType=" + permissionType)
                .add("allowedVisibilities=" + allowedVisibilities)
                .toString();
    }
@param allowedVisibilities the set of discoverabilities allowed
manager/api/beans/src/main/java/io/apiman/manager/api/beans/idm/PermissionConstraint.java