Whether the actor holds what writing a setting takes: the :permission its definition declares, or admin:dashboard:setting when it declares none or no definition names the key (MishkaCmsCore.Settings.write_permission/1). Asked of the row's key, within the actor's own site as every MishkaCmsCore.Accounts.Checks.AccessPermissions check is.

policy action_type([:create, :update, :destroy]) do
  authorize_if MishkaCmsCore.Runtime.Resources.Checks.SettingPermission
end