import { ParserRuleContext } from 'antlr4ts';
import { BaseListener } from './baseListener.js';
export declare class ExperimentalSwitchMutator extends BaseListener {
    enterSwitchStatement(ctx: ParserRuleContext): void;
    private isElseCase;
    private createSwapAdjacentValuesMutations;
    /**
     * Swap-span mutation spans two when-clauses. The MutationListener only
     * verifies the switch-statement start line is covered; this method asserts
     * coverage for at least one line inside each when-clause so we never emit
     * a mutation whose replacement body is wholly uncovered.
     */
    private isSpanCovered;
}