The Symbol.toStringTag static data property represents the well-known symbol Symbol.toStringTag. Object.prototype.toString() looks up this symbol on the this value for the property containing a string that represents the type of the object.

The Error() constructor creates Error objects.

The Date() constructor creates Date objects. When called as a function, it returns a string representing the current time.

The AsyncGeneratorFunction() constructor creates AsyncGeneratorFunction objects.

A lazy iterator producing elements in the union of `HashSet`s.

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The columnNumber data property of an Error instance contains the column number in the line of the file that raised this error.

A draining iterator over the elements of a `BinaryHeap`.

The prototype property of AsyncGeneratorFunction.prototype is shared by all async generator functions. Its value is AsyncGenerator.prototype. Each async generator function created with the async function* syntax or the AsyncGeneratorFunction() constructor also has its own prototype property, whose prototype is AsyncGeneratorFunction.prototype.prototype. When the async generator function is called, its prototype property becomes the prototype of the returned async generator object.

The lineNumber data property of an Error instance contains the line number in the file that raised this error.