presto-main/src/main/java/io/prestosql/connector/system/KillQueryProcedure.java/KillQueryProcedure/KillQueryProcedure
class KillQueryProcedure:    @Inject
    public KillQueryProcedure(Optional<DispatchManager> dispatchManager)
    {
        this.dispatchManager = requireNonNull(dispatchManager, "dispatchManager is null");
    }