import { IBaseValidatorDefinition, IValidator } from "../interfaces";
export interface IRequiredValidatorDefinition extends IBaseValidatorDefinition {
    required: string[];
}
export declare class RequiredValidator implements IValidator<any | null, IRequiredValidatorDefinition> {
    definition: IRequiredValidatorDefinition;
    constructor(definition: IRequiredValidatorDefinition);
    validate(input: any | null): {
        definition: IRequiredValidatorDefinition;
        input: any;
    } | null;
}