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=== tests/cases/conformance/types/typeRelationships/typeInference/bivariantInferences.ts ===
// Repro from #27337
interface Array<T> {
equalsShallow<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>): boolean;
>equalsShallow : <T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean
>this : ReadonlyArray<T>
>other : ReadonlyArray<T>
}
declare const a: (string | number)[] | null[] | undefined[] | {}[];
>a : (string | number)[] | null[] | undefined[] | {}[]
>null : null
declare const b: (string | number)[] | null[] | undefined[] | {}[];
>b : (string | number)[] | null[] | undefined[] | {}[]
>null : null
let x = a.equalsShallow(b);
>x : boolean
>a.equalsShallow(b) : boolean
>a.equalsShallow : (<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean) | (<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean) | (<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean) | (<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean)
>a : (string | number)[] | null[] | undefined[] | {}[]
>equalsShallow : (<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean) | (<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean) | (<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean) | (<T>(this: ReadonlyArray<T>, other: ReadonlyArray<T>) => boolean)
>b : (string | number)[] | null[] | undefined[] | {}[]
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