import Symbol from './symbol.js';
import { AnyConfig } from '../config.js';
import GridData from '../grid.js';
import { State } from '../primitives.js';
/**
 * A marker for symbols not supported by the current solver.
 * Solvers should count these symbols in the symbols per region rule but otherwise ignore them.
 */
export default class UnsupportedSymbol extends Symbol {
    readonly title = "Unsupported Symbol";
    private static readonly CONFIGS;
    private static readonly EXAMPLE_GRID;
    get id(): string;
    get explanation(): string;
    get configs(): readonly AnyConfig[] | null;
    createExampleGrid(): GridData;
    validateSymbol(_grid: GridData, _solution: GridData | null): State;
    copyWith({ x, y }: {
        x?: number;
        y?: number;
    }): this;
}
export declare const instance: UnsupportedSymbol;