public function forRole(string $role_id, bool $no_cache = false): array
    {
        if (($collection = &$this->cacheKey(__FUNCTION__, $role_id)) !== null && !$no_cache) {
            return $collection; // Already cached this.
        }
        $collection = []; // Initialize.

        if ($role_id === 'super_admin') {
            $role_id = 'administrator';

            if ($this->Wp->is_multisite) {
                $collection = array_merge($collection, [
                    'manage_network'         => 'manage_network',
                    'manage_sites'           => 'manage_sites',
                    'manage_network_users'   => 'manage_network_users',
                    'manage_network_plugins' => 'manage_network_plugins',
                    'manage_network_themes'  => 'manage_network_themes',
                    'manage_network_options' => 'manage_network_options',
                ]);
            }
        }
        $role = get_role($role_id); // If role exists.

        foreach (array_keys($role->capabilities ?? []) as $_role_cap) {
            $collection[$_role_cap] = $_role_cap;
        } // unset($_role_cap); // Housekeeping.

        asort($collection, SORT_NATURAL);

        return $collection;
    }