Rhode Island business groups are asking state lawmakers not to emulate Massachusetts' tax on companies whose workers receive public health insurance, saying it has had "devastating" and "nightmarish" economic consequences there.Grocers, home-care providers, restaurant chains and some hospitals are among the business interests fighting the plan in Gov. Gina Raimondo's budget to charge companies with at least 300 employees a 10-percent fee on the wages of Medicaid-enrolled workers.