import { GraphQLOutputType } from 'graphql';
import { QueryNodeListType, QueryNodeNonNullType, QueryNodeObjectType, QueryNodeOutputType } from './definition';
import { QueryNodeNullableType } from './index';
export declare function isGraphQLOutputType(type: {}): type is GraphQLOutputType;
export declare function extractQueryTreeObjectType(type: QueryNodeOutputType): QueryNodeObjectType | undefined;
export declare function isListTypeIgnoringNonNull(type: QueryNodeOutputType): boolean;
export declare function makeNonNullableList<T extends QueryNodeNullableType>(type: T): QueryNodeNonNullType<QueryNodeListType<QueryNodeNonNullType<T>>>;