import { JupyterFrontEndPlugin } from '@jupyterlab/application';
import { IEditorExtensionRegistry } from '@jupyterlab/codemirror';
import { IEditorTracker } from '@jupyterlab/fileeditor';
import { WidgetLSPAdapter, VirtualDocument } from '@jupyterlab/lsp';
import { IRenderMimeRegistry } from '@jupyterlab/rendermime';
import { ITableOfContentsRegistry } from '@jupyterlab/toc';
import { Throttler } from '@lumino/polling';
import { Widget } from '@lumino/widgets';
import type * as lsProtocol from 'vscode-languageserver-protocol';
import { CodeSymbols as LSPSymbolSettings } from '../_symbol';
import { ContextAssembler } from '../context';
import { FeatureSettings, Feature } from '../feature';
import { BrowserConsole } from '../virtual/console';
export declare class SymbolFeature extends Feature {
    readonly capabilities: lsProtocol.ClientCapabilities;
    readonly id: string;
    protected console: BrowserConsole;
    protected settings: FeatureSettings<LSPSymbolSettings>;
    protected cache: WeakMap<WidgetLSPAdapter<any>, lsProtocol.DocumentSymbol>;
    protected contextAssembler: ContextAssembler;
    getSymbols: Throttler<lsProtocol.DocumentSymbol[] | null, void, [
        WidgetLSPAdapter<any>,
        VirtualDocument
    ]>;
    constructor(options: SymbolFeature.IOptions);
    isApplicable(widget: Widget): boolean;
    protected createThrottler(): Throttler<lsProtocol.DocumentSymbol[] | null, void, [WidgetLSPAdapter<any>, VirtualDocument]>;
    private _getSymbols;
    private _handleSymbols;
}
export declare namespace SymbolFeature {
    interface IOptions extends Feature.IOptions {
        settings: FeatureSettings<LSPSymbolSettings>;
        renderMimeRegistry: IRenderMimeRegistry;
        editorExtensionRegistry: IEditorExtensionRegistry;
        contextAssembler: ContextAssembler;
        tocRegistry: ITableOfContentsRegistry | null;
        editorTracker: IEditorTracker | null;
    }
    const id: string;
}
export declare const SYMBOL_PLUGIN: JupyterFrontEndPlugin<void>;