import { FlattenedColumnOrColumnGroupConfig } from './types';
import { ColumnConfig, ColumnOrColumnGroupConfig, ObjectForExtending } from '../types';

export declare function isNotGroupColumn<Row extends ObjectForExtending, SummRow>(column: ColumnOrColumnGroupConfig<Row, SummRow>): column is ColumnConfig<Row, SummRow>;
export declare function getDeepestChildren<Row extends ObjectForExtending, SummRow>(cols: readonly ColumnOrColumnGroupConfig<Row, SummRow>[]): readonly ColumnConfig<Row, SummRow>[];
export declare const flattenCols: <RowType extends ObjectForExtending, SummaryRowType>(arr: readonly ColumnOrColumnGroupConfig<RowType, SummaryRowType>[], getChildren: (col: ColumnOrColumnGroupConfig<RowType, SummaryRowType>) => ColumnOrColumnGroupConfig<RowType, SummaryRowType>[] | undefined, getParent: (item: ColumnOrColumnGroupConfig<RowType, SummaryRowType>) => ColumnOrColumnGroupConfig<RowType, SummaryRowType> | null, level?: number, parent?: ColumnOrColumnGroupConfig<RowType, SummaryRowType> | null) => Array<FlattenedColumnOrColumnGroupConfig<RowType, SummaryRowType>>;