import { ContextService } from '../../context';
import { DeriveContextServiceContract } from '../../../models/context/update-context-method';
import { ValueChangeCallback } from '../../../models/context/value-change-callback';
import { GraphExploreSettings } from '../../../models/graph-explore/graph-explore-settings';
type GraphExploreContextFields = {
    readonly SETTINGS: string;
};
type GraphExploreContextFieldParams = {
    readonly SETTINGS: GraphExploreSettings;
};
/**
 * Service for managing the graph-explore settings context.
 */
export declare class GraphExploreContextService extends ContextService<GraphExploreContextFields> implements DeriveContextServiceContract<GraphExploreContextFields, GraphExploreContextFieldParams> {
    readonly SETTINGS = "graphExploreSettings";
    /**
     * Updates the default graph-explore settings in the context.
     *
     * @param settings - The new default settings object to be set in the context.
     */
    updateSettings(settings: GraphExploreSettings): void;
    /**
     * Subscribes to changes in the default graph-explore settings context.
     *
     * @param callbackFn - A callback function that will be called when the default settings change.
     * @returns A function that, when called, will unsubscribe from the default settings changes.
     */
    onSettingsChanged(callbackFn: ValueChangeCallback<GraphExploreSettings | undefined>): () => void;
    /**
     * Retrieves the default graph-explore settings stored in the context. When the context holds no
     * value yet, falls back to the built-in {@link DEFAULT_GRAPH_EXPLORE_SETTINGS} configuration.
     *
     * @return the default graph-explore settings.
     */
    getSettings(): GraphExploreSettings;
}
export {};