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

export function duplicateInputFieldMessage(fieldName: string): string;

/**
 * Unique input field names
 *
 * A GraphQL input object value is only valid if all supplied fields are
 * uniquely named.
 */
export function UniqueInputFieldNames(context: ASTValidationContext): ASTVisitor;