Generates an array for rendering the given node.
Drupal\node\Node $node: A node entity.
$view_mode: (optional) View mode, e.g., 'full', 'teaser'... Defaults to 'full.'
$langcode: (optional) A language code to use for rendering. Defaults to NULL which is the global content language of the current request.
An array as expected by drupal_render().
function node_view(Node $node, $view_mode = 'full', $langcode = NULL) {
return entity_view($node, $view_mode, $langcode);
}