Skip testMethodPrinting when ES6 not supported by Esprima.
Skip testMethodPrinting when ES6 not supported by Esprima.

kyldvs/recast,benjamn/recast,cpojer/recast,benjamn/recast,kassens/recast,fkling/recast,ipeychev/recast,benjamn/recast,marcioj/recast,shumov/recast,rwaldron/recast,stefanpenner/recast,ersengultepe/recast