import ts from 'typescript';
import { Context } from '../../../../Context';
export declare const hasUndefined: (context: Context, node: ts.Node, type: ts.Type) => boolean;
export declare const isOnlyUndefined: (context: Context, node: ts.Node, type: ts.Type) => boolean;
export declare const isUndefined: (_context: Context, _node: ts.Node, type: ts.Type) => boolean;