| 1 | /**
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| 2 | * Returns a number that represents how many elements in the specified sequence satisfy a condition if present,
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| 3 | * else the number of items in the collection.
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| 4 | * @param {Iterable<T>} source A sequence that contains elements to be tested and counted.
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| 5 | * @param {function(value: T): boolean} [predicate] A function to test each element for a condition.
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| 6 | */
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| 7 | export declare function count<T>(source: Iterable<T>, predicate?: (value: T) => boolean): number;
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