export declare const nonEnumerable: (target: any, propertyKey: string) => void;
/**
 * Checks if the property with name key of the entity is a navigation property.
 * @param key - Name of the property.
 * @param entityConstructor - Constructor of the entity.
 * @returns A boolean denoting whether an entity is a navigation property or not.
 */
export declare function isNavigationProperty(key: string, entityConstructor: any): boolean;
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