import { FExecutionContext } from '@freemework/common';
import { WorkflowVirtualMachine } from '../WorkflowVirtualMachine.js';
import { Activity, ActivityElement } from './Activity.js';
import { NativeActivity } from './NativeActivity.js';
export declare class IfActivity extends NativeActivity {
    static of(vmContext: WorkflowVirtualMachine.Context): IfActivityElement;
    constructor(opts: {
        readonly conditionActivity: Activity;
        readonly trueActivity: Activity;
        readonly falseActivity?: Activity;
    });
    protected onExecute(executionContext: FExecutionContext): Promise<void>;
}
export declare class IfActivityElement extends ActivityElement<IfActivity> {
    constructor(stackFrame: WorkflowVirtualMachine.StackFrame<IfActivity>);
    get conditionResult(): boolean;
    markTrue(): void;
    markFalse(): void;
}