The type of the elements in the source sequence.
Source iterable sequence.
Optional options: OptionalFindOptions<T>The optional options which includes a predicate for filtering, and thisArg for predicate binding.
The single element in the 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 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 iterable sequence.