NodeAccessGrantsCacheContext::checkNodeGrants

protected NodeAccessGrantsCacheContext::checkNodeGrants($operation)

protected function checkNodeGrants($operation) {
  // When checking the grants for the 'view' operation and the current user
  // has a global view grant (i.e. a view grant for node ID 0) — note that
  // this is automatically the case if no node access modules exist (no
  // hook_node_grants() implementations) then we don't need to determine the
  // exact node view grants for the current user.
  if ($operation === 'view' && node_access_view_all_nodes($this->user)) {
    return 'view.all';
  }

  $grants = node_access_grants($operation, $this->user);
  $grants_context_parts = [];
  foreach ($grants as $realm => $gids) {
    $grants_context_parts[] = $realm . ':' . implode(',', $gids);
  }
  return $operation . '.' . implode(';', $grants_context_parts);
}