import { FunctionResolver, FunctionType, XPathContext } from './xpath-types';
export declare class FunctionResolverImpl implements FunctionResolver {
    static getFunctionFromContext(qName: string, context: XPathContext): FunctionType | undefined;
    functions: {
        [key: string]: FunctionType | undefined;
    };
    constructor();
    addStandardFunctions(): void;
    addFunction(ns: string, ln: string, f: FunctionType): void;
    getFunction(localName: string, namespace: string): FunctionType | undefined;
}