import type { CypherEnvironment } from "../../Environment";
import type { Variable } from "../../references/Variable";
import type { CypherCompilable, Expr } from "../../types";
import { MapExpr } from "./MapExpr";
/** Represents a Map projection
 * @see {@link https://neo4j.com/docs/cypher-manual/current/syntax/maps/#cypher-map-projection | Cypher Documentation}
 * @group Maps
 * @example
 * ```cypher
 * this { .title }
 * ```
 */
export declare class MapProjection implements CypherCompilable {
    private readonly extraValues;
    private readonly variable;
    private readonly projection;
    private readonly isStar;
    constructor(variable: Variable, projection?: "*" | string[], extraValues?: Record<string, Expr>);
    set(values: Record<string, Expr> | string): void;
    /** Converts the Map projection expression into a normal Map expression
     * @example
     * Converts
     * ```cypher
     * this { .title }
     * ```
     * into:
     * ```cypher
     * { title: this.title }
     * ```
     */
    toMap(): MapExpr;
    /** @internal */
    getCypher(env: CypherEnvironment): string;
    private setExtraValues;
}