curly: Rewrite to AbstractWalker (#2611)
curly: Rewrite to AbstractWalker (#2611)


andy-ms/tslint,andy-hanson/tslint,JoshuaKGoldberg/tslint,mprobst/tslint,berickson1/tslint,IllusionMH/tslint,JoshuaKGoldberg/tslint,andy-hanson/tslint,andy-hanson/tslint,berickson1/tslint,IllusionMH/tslint,JoshuaKGoldberg/tslint,palantir/tslint,palantir/tslint,palantir/tslint,berickson1/tslint,andy-ms/tslint,mprobst/tslint,IllusionMH/tslint,mprobst/tslint,andy-ms/tslint