/**
* Registers a resolver
*/
public static void RegisterResolver(string queryId, QueryResultResolver resolver)
{
systemInstance.RegisterResolver(queryId, resolver);
}
/**
* Registers a query resolver
*/
public void RegisterResolver(string queryId, QueryResultResolver resolver)
{
Assertion.Assert(!this.resolverMap.ContainsKey(queryId)); // system should not contains the specified resolver yet
this.resolverMap[queryId] = resolver;
}