/// <reference path="fourslash.ts" />

//// function f18(a?:string, ...b){}
////  
//// function f19(a?:string, b?){}
////  
//// function f20(a:string, b?:string, ...c:number[]){}
////  
//// function f21(a:string, b?:string, ...d:number[]){}

edit.disableFormatting();
diagnostics.validateTypesAtPositions(133);