import { EncodeComponent as EC } from '../runtime';
import { TransformEncode } from '../spec';
export type TransformOptions = Omit<TransformEncode, 'type'>;
/**
 * Extract a column of data with specified map function from data.
 * Each datum in the array is not visual data by default.
 * Specifying identity scale for related channel explicitly will treat them as visual data.
 */
export declare const Transform: EC<TransformOptions>;