Chris@0: /**
Chris@0:  * Implements hook_preprocess_HOOK().
Chris@0:  */
Chris@0: function {{ machine_name }}_preprocess_HOOK(&$variables) {
Chris@0:   // This example is from rdf_preprocess_image(). It adds an RDF attribute
Chris@0:   // to the image hook's variables.
Chris@0:   $variables['attributes']['typeof'] = ['foaf:Image'];
Chris@0: }