import { Spec } from 'vega';
import { VisAdapter } from 'olli';
/**
 * Adapter function that breaks down a Vega visualization into it's basic visual grammar
 * @param spec The Vega Specification used to generate the visualization
 * @returns the {@link OlliVisSpec}, the non-concrete visualization information that can be later used to
 * generate the Accessibility Tree Encoding
 */
export declare const VegaAdapter: VisAdapter<Spec>;
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