import { Observable, ObservableInput, OperatorFunction } from 'rxjs';
/**
 * Makes a cold observable from any emitted parameterless function that returns `ObservableInput`.
 * This operator is especially handy for turning asynchronous functions into cold observables.
 *
 * @category Operator
 */
export declare function coldFrom<T>(): OperatorFunction<() => ObservableInput<T>, Observable<T>>;
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