import { AnyConfig } from '../config.js';
import { SymbolMergeHandler } from '../events/onSymbolMerge.js';
import GridData from '../grid.js';
import NumberSymbol from './numberSymbol.js';
import Symbol from './symbol.js';
export default class FocusSymbol extends NumberSymbol implements SymbolMergeHandler {
    readonly deadEnd: boolean;
    get title(): string;
    private static readonly CONFIGS;
    private static readonly EXAMPLE_GRID;
    private static readonly EXAMPLE_GRID_DEAD_END;
    /**
     * **Focus Numbers count directly adjacent cells of the same color**
     * @param x - The x-coordinate of the symbol.
     * @param y - The y-coordinate of the symbol.
     * @param deadEnd - Whether this Focus Number is a Dead End.
     * @param number - The focus number.
     */
    constructor(x: number, y: number, deadEnd: boolean, number: number);
    get id(): string;
    get placementStep(): number;
    get explanation(): string;
    get configs(): readonly AnyConfig[] | null;
    createExampleGrid(): GridData;
    private countForColor;
    countTiles(grid: GridData): {
        completed: number;
        possible: number;
    };
    descriptionEquals(other: Symbol): boolean;
    copyWith({ x, y, deadEnd, number, }: {
        x?: number;
        y?: number;
        deadEnd?: boolean;
        number?: number;
    }): this;
    withNumber(number: number): this;
    withDeadEnd(deadEnd: boolean): this;
}
export declare const instance: FocusSymbol;