import type { BlockStatement, Comment, SourceLocation } from 'estree';
import { type StepperExpression, type StepperPattern, undefinedNode } from '..';
import { StepperBaseNode } from '../../interface';
import type { StepperStatement } from '../Statement';
import type { RedexInfo } from '../..';
export declare class StepperBlockExpression extends StepperBaseNode<BlockStatement> {
    readonly body: StepperStatement[];
    readonly innerComments?: Comment[] | undefined;
    constructor(body: StepperStatement[], innerComments?: Comment[] | undefined, leadingComments?: Comment[] | undefined, trailingComments?: Comment[] | undefined, loc?: SourceLocation | null | undefined, range?: [number, number] | undefined);
    static create(node: BlockStatement): StepperBlockExpression;
    isContractible(redex: RedexInfo): boolean;
    isOneStepPossible(redex: RedexInfo): boolean;
    contract(redex: RedexInfo): StepperExpression | typeof undefinedNode;
    oneStep(redex: RedexInfo): StepperBlockExpression | typeof undefinedNode | StepperExpression;
    substitute(id: StepperPattern, value: StepperExpression, redex: RedexInfo): StepperBlockExpression;
    scanAllDeclarationNames(): string[];
    freeNames(): string[];
    allNames(): string[];
    rename(before: string, after: string): StepperBlockExpression;
}