import { Observer } from './runtime/observer';
/**
 * Extracts all Observers from the specified Instances
 * and returns them in the given order.
 *
 * ```
 * const response = extractObservers([myState, myGroup, undefined]);
 * console.log(response); // See below
 * {
 *   {value: Observer},
 *   {value: Observer, output: Observer},
 *   {}
 * }
 * ```
 *
 * @internal
 * @param instances - Instances to extract the Observers from.
 */
export declare function extractObservers(instances: Array<any>): Array<{
    [key: string]: Observer | undefined;
}>;
/**
 * Extracts all Observers from the specified Instance.
 *
 * ```
 * const response = extractObservers(myState);
 * console.log(response); // See below
 * {
 *  value: Observer
 * }
 * ```
 *
 * @internal
 * @param instances - Instance to extract the Observers from.
 */
export declare function extractObservers(instances: any): {
    [key: string]: Observer | undefined;
};
/**
 * Extracts the most relevant Observers
 * from the specified Instance/s in array shape
 * and returns the extracted Observers in the given order.
 *
 * What type of Observer is extracted from an Instance,
 * depends on the specified `observerType`.
 * If no `observerType` is specified, the Observers found in the dependency
 * are selected in the following `observerType` order.
 * 1. `output`
 * 2. `value`
 *
 * @internal
 * @param instances - Instances in array shape  to extract the Observers from.
 * @param observerType - Type of Observer to be extracted.
 */
export declare function extractRelevantObservers<X extends Array<any>>(instances: X, observerType?: string): Array<Observer | undefined>;
/**
 * Extracts the most relevant Observers
 * from the specified Instance/s in object shape
 * and returns the extracted Observers in the given order.
 *
 * What type of Observer is extracted from an Instance,
 * depends on the specified `observerType`.
 * If no `observerType` is specified, the Observers found in the dependency
 * are selected in the following `observerType` order.
 * 1. `output`
 * 2. `value`
 *
 * @internal
 * @param instances - Instances in object shape to extract the Observers from.
 * @param observerType - Type of Observer to be extracted.
 */
export declare function extractRelevantObservers<X extends {
    [key: string]: any;
}>(instances: X, observerType?: string): {
    [key: string]: Observer | undefined;
};
/**
 * Retrieves the module with the specified key/name identifier
 * and returns `null` if the module couldn't be found.
 *
 * @param moduleName - Key/Name identifier of the module to be retrieved.
 * @param error - Whether to print an error, when the module couldn't be retrieved.
 */
export declare function optionalRequire<PackageType = any>(moduleName: string, error?: boolean): PackageType | null;
/**
 * Binds the specified Instance globally at the provided key identifier.
 *
 * Learn more about global bound instances:
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/globalThis
 *
 * @public
 * @param key - Key/Name identifier of the specified Instance.
 * @param instance - Instance to be bound globally.
 * @param overwrite - When already an Instance exists globally at the specified key,
 * whether to overwrite it with the new Instance.
 */
export declare function globalBind(key: string, instance: any, overwrite?: boolean): boolean;
/**
 * Returns a boolean indicating whether AgileTs is currently running on a server.
 *
 * @public
 */
export declare const runsOnServer: () => boolean;