/**
 * Symbol used as a key to mark a class as being dependency-injectable.
 */
export declare const ClassIsInjectableKey: symbol;
/**
 * Symbol used as a key to contain the array of InjectionData objects
 * corresponding to a class's constructor arguments.
 */
export declare const ConstructorInjectionsKey: symbol;
/**
 * Symbol used as a key to contain the map of InjectionData objects
 * by object properties.
 */
export declare const PropertyInjectionsKey: symbol;