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=== tests/cases/compiler/mapConstructor.ts ===
new Map();
>new Map() : Map<any, any>
>Map : MapConstructor
const potentiallyUndefinedIterable = [['1', 1], ['2', 2]] as Iterable<[string, number]> | undefined;
>potentiallyUndefinedIterable : Iterable<[string, number]> | undefined
>[['1', 1], ['2', 2]] as Iterable<[string, number]> | undefined : Iterable<[string, number]> | undefined
>[['1', 1], ['2', 2]] : [string, number][]
>['1', 1] : [string, number]
>'1' : "1"
>1 : 1
>['2', 2] : [string, number]
>'2' : "2"
>2 : 2
new Map(potentiallyUndefinedIterable);
>new Map(potentiallyUndefinedIterable) : Map<string, number>
>Map : MapConstructor
>potentiallyUndefinedIterable : Iterable<[string, number]> | undefined
const potentiallyNullIterable = [['1', 1], ['2', 2]] as Iterable<[string, number]> | null;
>potentiallyNullIterable : Iterable<[string, number]> | null
>[['1', 1], ['2', 2]] as Iterable<[string, number]> | null : Iterable<[string, number]> | null
>[['1', 1], ['2', 2]] : [string, number][]
>['1', 1] : [string, number]
>'1' : "1"
>1 : 1
>['2', 2] : [string, number]
>'2' : "2"
>2 : 2
>null : null
new Map(potentiallyNullIterable);
>new Map(potentiallyNullIterable) : Map<string, number>
>Map : MapConstructor
>potentiallyNullIterable : Iterable<[string, number]> | null
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