neo4J java query parameters

neo4J java query parameters

I have a problem to pass list of string to my parameter {code}
String request = "START sdg=node:Sfamilly(master = {code}) MATCH
t-[CONTAINS_SF]->sdg RETURN count(distinct t) as count"
Map<String, Object> params = new HashMap<String, Object>();
List<String> codes = new ArrayList<String>();
codes.add("1234");
codes.add("12345");
params.put("master", codes);
Result<Map<String, Object>> resultMag = neo4jTemplate.query(request,params);
it appears that my parameters are not considered ?
Any idea ?
I use spring data neo4j rest 2.3.0.M1.
Thanks. Charles.