Actually hook up the memoizer for UserRole.

src/Users/UserRole.php

@@ -179,6 +179,7 @@ class UserRole implements ArrayAccess, HasRankInterface {
         return sprintf(self::QUERY_SELECT, sprintf(self::SELECT, self::TABLE));
     }
     public static function byId(int $roleId): self {
+        return self::memoizer()->find($roleId, function() use ($roleId) {
             $object = DB::prepare(
                 self::byQueryBase() . ' WHERE `role_id` = :role'
             )   ->bind('role', $roleId)
@@ -186,6 +187,7 @@ class UserRole implements ArrayAccess, HasRankInterface {
             if(!$object)
                 throw new UserRoleNotFoundException;
             return $object;
+        });
     }
     public static function byDefault(): self {
         return self::byId(self::DEFAULT);