export type GenericObject = Record<string, unknown>;
type NullableConstraint<T> = null extends T ? unknown : undefined extends T ? unknown : never;
export declare function assert(condition: boolean, errorOrMessage: Error | string): asserts condition;
export declare function assertGenericObject(_object: object): asserts _object is GenericObject;
export declare function assertNonNullable<T extends NullableConstraint<T>>(value: T, errorOrMessage?: Error | string): asserts value is NonNullable<T>;
export declare function ensureGenericObject<T extends object>(object: T): GenericObject & T;
export declare function ensureNonNullable<T extends NullableConstraint<T>>(value: T, errorOrMessage?: Error | string): NonNullable<T>;
export {};