graphql/validation/rules/UniqueVariableNamesRule.d.ts

import { ASTVisitor } from '../../language/visitor';
import { ASTValidationContext } from '../ValidationContext';

/**
 * Unique variable names
 *
 * A GraphQL operation is only valid if all its variables are uniquely named.
 */
export function UniqueVariableNamesRule(
  context: ASTValidationContext,
): ASTVisitor;