/** @purpose Raised when attempting to register a provider with a key already in use. */
export declare class DuplicateProviderError extends Error {
    /** @purpose The conflicting provider key */
    readonly key: string;
    /**
     * @purpose Construct with the duplicate key and a trace-prefixed message.
     * @param key The provider key that is already registered.
     */
    constructor(key: string);
}
/** @purpose Raised when attempting to access a provider that is not registered. */
export declare class ProviderNotFoundError extends Error {
    /** @purpose The missing provider key */
    readonly key: string;
    /**
     * @purpose Construct with the missing key and a trace-prefixed message.
     * @param key The provider key that was not found.
     */
    constructor(key: string);
}