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

        foreach (wp_roles()->roles as $_role_id => $_role) {
            foreach (array_keys($_role['capabilities'] ?? []) as $_role_cap) {
                $collection[$_role_cap] = $_role_cap;
            }
        } // unset($_role_id, $_role, $_role_cap); // Housekeeping.

        $collection = array_merge($collection, $this->forRole('super_admin', $no_cache));

        foreach (get_post_types([], 'objects') as $_post_type => $_post_type_object) {
            foreach ($_post_type_object->cap ?? [] as $_core_cap => $_post_type_cap) {
                if (!in_array($_core_cap, ['read_post', 'edit_post', 'delete_post'], true)) {
                    // ↑ Do not include post meta caps; see: <http://jas.xyz/1XN7IKd>
                    $collection[$_core_cap]      = $_core_cap;
                    $collection[$_post_type_cap] = $_post_type_cap;
                }
            } // unset($_core_cap, $_post_type_cap);
        } // unset($_post_type, $_post_type_object); // Housekeeping.

        foreach (get_taxonomies([], 'objects') as $_taxonomy => $_taxonomy_object) {
            foreach ($_taxonomy_object->cap ?? [] as $_core_cap => $_taxonomy_cap) {
                $collection[$_core_cap]     = $_core_cap;
                $collection[$_taxonomy_cap] = $_taxonomy_cap;
            } // unset($_core_cap, $_taxonomy_cap);
        } // unset($_taxonomy, $_taxonomy_object); // Housekeeping.

        asort($collection, SORT_NATURAL);

        return $collection;
    }