The type of the elements in the source sequence.
Source async-iterable sequence.
Optional
options: OptionalFindOptions<T>The optional options which includes a predicate for filtering, thisArg for predicate binding and an abort signal for cancellation.
A promise with the single element in the async-iterable sequence that satisfies the condition in the predicate, or undefined if no such element exists.
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Returns the only element of an async-iterable sequence that matches the predicate if specified, or undefined if no such element exists; this method reports an exception if there is more than one element in the async-iterable sequence.