/**
 * All BeSureValidators accept a single value and return a boolean indicating validation outcome
 */
export type BeSureValidator = (value: any) => boolean;
export type BeSureKey = 'array' | 'array-not-empty' | 'bool' | 'email' | 'id' | 'int' | 'int+' | 'name' | 'defined' | 'object' | 'object-not-empty' | 'page' | 'slug' | 'slug-mixed' | 'string' | 'string-not-empty';
export declare function getValidator(key: BeSureKey): BeSureValidator;
export type CustomValidators = {
    [key: string]: BeSureValidator;
};
/**
 *
 * @param {string} key the key used to refer to the new validator
 * @param {BeSureValidator} func the validator function
 */
export declare function setCustomValidators(cvs: CustomValidators): void;
/**
 *
 * @param {string} key the key to seek in coreValidators and customValidators
 * @returns {BeSureValidator} function if a match is found
 */
export declare function getCustomValidator(key: string): BeSureValidator | undefined;