import type { ASTVisitor } from '../../language/visitor';
import type { ASTValidationContext } from '../ValidationContext';
/**
* Unique fragment names
*
* A GraphQL document is only valid if all defined fragments have unique names.
* See https://spec.graphql.org/draft/#sec-Fragment-Name-Uniqueness
*/
export declare function UniqueFragmentNamesRule(
context: ASTValidationContext,
): ASTVisitor;