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=== tests/cases/conformance/functions/functionOverloadErrorsSyntax.ts ===
//Function overload signature with optional parameter followed by non-optional parameter
function fn4a(x?: number, y: string);
>fn4a : (x?: number, y: string) => any
>x : number
>y : string
function fn4a() { }
>fn4a : (x?: number, y: string) => any
function fn4b(n: string, x?: number, y: string);
>fn4b : (n: string, x?: number, y: string) => any
>n : string
>x : number
>y : string
function fn4b() { }
>fn4b : (n: string, x?: number, y: string) => any
//Function overload signature with rest param followed by non-optional parameter
function fn5(x: string, ...y: any[], z: string);
>fn5 : (x: string, ...y: any[], z: string) => any
>x : string
>y : any[]
>z : string
function fn5() { }
>fn5 : (x: string, ...y: any[], z: string) => any
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