import { CsvField, FlattenCallback, JsonField, Path } from './types.js';
export declare function collectFields<T>(records: T[], flatten: FlattenCallback): CsvField<T>[];
export declare function toFields(names: string[], nested: boolean): JsonField[];
/**
 * Create an array which has an entry for every column in a CSV file, which is:
 * - undefined when the column is not needed in the generated JSON output
 * - JsonField otherwise, where the field can be configured by index, or by name
 *   In the latter case, the index will be resolved by looking the field name up in the
 *   list with fieldNames (containing all available fields)
 */
export declare function mapFields(fieldNames: string[], fields: JsonField[]): (JsonField | undefined)[];
export declare function collectNestedPaths<T>(array: T[], recurse: FlattenCallback): Path[];
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