export declare class EmulateList {
    /**
     * the last passed value of the parent list
     */
    observableValue: any[];
    /**
     * An array used to store write operations that require an initial value to be set
     * in {@link value} before being applied
     */
    que: any[];
    constructor();
    /**
     * Emulates an offline write assuming the remote data has not changed
     * @param observableValue the current value of the parent list
     * @param method AngularFire2 write method to emulate
     * @param value new value to write
     * @param key optional key used with some write methods
     */
    emulate(observableValue: any, method: any, value?: any, key?: any): any[];
    /**
     * Emulates write opperations that require an initial value.
     *
     * - Some write operations can't happen if there is no intiial value. So while the app is waiting
     * for a value, those operations are stored in a queue.
     * - processQue is called after an initial value has been added to the parent observable
     */
    processQue(observableValue: any): any[];
    /**
     * Calculates the result of a given emulation without updating subscribers of the parent Observable
     *
     * - this allows for the processing of many emulations before notifying subscribers
     * @param method the AngularFire2 method being emulated
     * @param value the new value to be used by the given method
     * @param key can be used for remove and required for update
     */
    private processEmulation(method, value, key);
}