/**
 * Describes the possible event types that
 * middlewares handle.
 */
export declare enum EventType {
    /**
     * An event emitted when a document is marked
     * as having been created or updated. This event
     * signals that the document likely needs to be
     * re-processed and re-indexed by middlewares
     * in the chain.
     */
    DOCUMENT_CREATED = "document-created",
    /**
     * An event emitted when a document is marked
     * as having been deleted. This event signals
     * that the document likely needs to be removed from
     * any storage by middlewares in the chain.
     * A good practice for middlewares that don't handle
     * persistence is to simply forward this event to
     * the next middlewares in the chain.
     */
    DOCUMENT_DELETED = "document-deleted"
}