import * as DG from 'datagrok-api/dg';
import { LruCache } from "datagrok-api/dg";
export declare abstract class BatchCellRenderer<T> extends DG.GridCellRenderer {
    currentTimeout: any;
    isRunning: boolean;
    cellsToLoad: {
        value: DG.GridCell;
        renderFuncs: Map<HTMLCanvasElement, () => (void)>;
    }[];
    cellsToLoadOnTimeoutComplete: {
        value: DG.GridCell;
        renderFunc: () => (void);
        canvas: HTMLCanvasElement;
    }[];
    cache: LruCache<string, T>;
    delay: number;
    constructor();
    abstract loadData(keys: string[]): Promise<Map<string, T>>;
    /**
      gridCell - cell that has to be loaded
      funcToRender - closure function to render cell
      canvas - cell's canvas
    **/
    retrieveBatch(gridCell: DG.GridCell, funcToRender: () => void, canvas: HTMLCanvasElement): Promise<void>;
}
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