/** @template T */
export class Emitter<T> {
    /**
     * @param {{
     * 	on: (dispatch: (arg: T) => void) => () => void
     * 	initialValue?: T | (() => T)
     * }} arg
     */
    constructor({ on, initialValue }: {
        on: (dispatch: (arg: T) => void) => () => void;
        initialValue?: T | (() => T);
    });
    use: () => SignalAccessor<T>;
    /** @param {(arg: T) => void} fn */
    on: (fn: (arg: T) => void) => void;
    #private;
}
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