import type { GraphQLSchema } from 'graphql';
/**
 * mapSchema can leave schema.astNode.operationTypes pointing at root types that
 * were removed (e.g. empty Mutation after filterSchema). Heal those AST nodes so
 * later SDL round-trips (mergeSchemas / printSchemaWithDirectives) stay valid.
 */
export declare function healSchemaRootAst(schema: GraphQLSchema): GraphQLSchema;