With using search API query, interwikisearch results is returned only
This request from Wikipedia will return "interwikisearch" results:
https://en.wikipedia.org/w/api.php?action=query&list=search&format=xml&redirects=resolve&srlimit=1&srenablerewrites=1&&srprop=snippet&srinterwiki=1&srsearch=Tolstoy
A similar request from Wikisource - will not return:
https://en.wikisource.org/w/api.php?action=query&list=search&format=xml&redirects=resolve&srlimit=1&srenablerewrites=1&&srprop=snippet&srinterwiki=1&srsearch=Tolstoy
Expected Results:
If &srinterwiki=1 is defined, "interwikisearch" should be returned from any projects.