/**
 * Generates a unique id of provided length.
 */
export declare const generateId: (val?: number) => string;
/**
 * Type cast an argument. If not type is provided it defaults to any
 * Provides A sneaky way to step around tricky TypeScript bugs 😅
 *
 * @param target
 */
export declare const Cast: <GNewType = any>(target: any) => GNewType;
/**
 * Removes all undefined values from an object. Neither Firestore nor the RealtimeDB allow `undefined` as a value.
 *
 * @param data The object to clean
 */
export declare const removeUndefined: <T extends {}>(data: T) => T;
/**
 * Log an error but not in the test environment
 */
export declare function logError(message: string, error?: Error): void;
export declare function logError(error: Error): void;
/**
 * Log an error but not in the test environment.
 */
export declare const simpleError: (message: string) => Error;
/**
 * For some reason process.env.NODE_ENV becomes undefined when importing a module whilst running jest tests.
 * This uses the injected Jest Environment to determine whether a test is currently running.
 */
export declare const isTestEnv: () => boolean;
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