import { ValidationError } from './createModel';
export interface Pipe<RepoType = any, Extensions = RepoType> {
    /**
     * Set an object up. Add virtuals and other properties.
     */
    prepare?(obj: RepoType & Partial<Extensions>): void;
    /**
     * Middleware.
     */
    use?(obj: RepoType & Partial<Extensions>, next: () => Promise<void>): Promise<void>;
    /**
     * Perform validation. Return either undefined or null to signal no validation errors.
     * Return either an array of Validation Errors, or a single validation error.
     *
     * @example
     * return {
     *   on: 'name',
     *   message: 'No name was provided',
     * }
     */
    validate?(obj: RepoType & Partial<Extensions>): void | undefined | null | ValidationError<RepoType & Extensions> | ValidationError<RepoType & Extensions>[];
}