Where can I run Streaming Expression in Solr. Also how can I get Cosine Similarity score in response

Where can I run Streaming Expression in Solr. 

Reference link - https://issues.apache.org/jira/browse/SOLR-12890

For example - 
sort(
select(
search(food_collection,
q=":",
fl="id,vector_fs",
sort="id asc",
rows=3),
cosineSimilarity(vector_fs, array(5.1,0.0,1.0,5.0,0.0,4.0,5.0,1.0)) as sim,
id),
by="sim desc")