import { DataFrame } from "./DataFrame";
import { IterableFrame, RowCursor, ColumnCursor, Schema } from "./types";
import { getData } from "./secret";
import { GroupFrame } from "./GroupFrame";
export declare class FragmentFrame<Name extends string = string> implements IterableFrame<Name> {
    private readonly data;
    readonly schema: Schema<Name>;
    private readonly index;
    private readonly origin;
    private readonly groupByCache;
    constructor(origin: DataFrame<Name> | FragmentFrame<Name>, index: number[]);
    getCursor(column: Name): ColumnCursor<Name>;
    groupBy(columns: Array<Name | ColumnCursor<Name>>): GroupFrame<Name>;
    uniqueValues(columns: Array<Name | ColumnCursor<Name>>): string[][];
    mapRows<A>(callback: (row: RowCursor, index: number) => A): A[];
    row(rowIndex: number): any[];
    [getData](): readonly [{
        name: Name;
        type?: any;
    }[], any[][], number[]];
    peak(column: Name | ColumnCursor<Name>): any;
}
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