import type { ASTVisitor } from '../../language/visitor';
import type { ASTValidationContext } from '../ValidationContext';
/**
* Unique input field names
*
* A GraphQL input object value is only valid if all supplied fields are
* uniquely named.
* See https://spec.graphql.org/draft/#sec-Input-Object-Field-Uniqueness
*/
export declare function UniqueInputFieldNamesRule(
context: ASTValidationContext,
): ASTVisitor;