import { ASTValidator } from '../ast-validator';
import { DocumentNode } from 'graphql';
import { ValidationMessage } from '../../../model';
export declare const VALIDATION_ERROR_ROLES_ON_NON_ROOT_ENTITY_TYPE = "@roles is only allowed on fields and on root entity types.";
export declare class RolesOnNonRootEntityTypesValidator implements ASTValidator {
    validate(ast: DocumentNode): ReadonlyArray<ValidationMessage>;
}