public class AVX_LeadHandler_cls {
    public void afterupdate( Map<Id,Lead> oldMapRecords, List<Lead> lstNewRecords ){

        List<Lead> lstleadConverted =new List<Lead>();
        for(Lead l : lstNewRecords)
        {
            if (l.Status =='Qualified'){

                lstleadConverted.add(l);
            }
        }

        if(lstleadConverted.size() > 0)
        {
            AVX_LeadHelper_cls.LeadConvert(lstleadConverted);
        }

    }

}