import type { WorkflowEntity } from '@n8n/db';
import type { WorkflowVariableRequirement } from './variable.types';
import type { RequirementsExtractor } from '../requirements-extractor';
export declare class VariableRequirementsExtractor implements RequirementsExtractor<WorkflowVariableRequirement> {
    extract(workflow: WorkflowEntity): WorkflowVariableRequirement[];
    private scan;
}