import * as t from '@babel/types';
import type { Metadata } from '../types';
/**
 * Given an object defined within an variant passed to `cssMap`, convert this object to
 * a less idiosyncratic form that can be directly processed by `buildCss`.
 *
 * For example, if our object is this:
 *
 *     {
 *       color: 'blue',
 *       '&:hover': {
 *         color: 'yellow',
 *       },
 *       '@media': {
 *         'screen and (min-width: 500px)': { ... }
 *         'screen and (min-width: 700px)': { ... }
 *       },
 *       selectors: {
 *         div: { color: 'orange' },
 *       }
 *     }
 *
 * This function will merge the two halves of the `@media` query (for example, to get
 * `@media screen and (min-width: 500px)`), and it will merge all of
 * the keys located in the value of `selectors`:
 *
 *     {
 *       color: 'blue',
 *       '&:hover': {
 *         color: 'yellow',
 *       },
 *       '@media screen and (min-width: 500px)': { ... }
 *       '@media screen and (max-width: 700px)': { ... }
 *       div: { color: 'orange' },
 *     }
 *
 * @param variantStyles an object expression representing the value of the cssMap variant
 * @param meta metadata from Babel, used for error messages
 * @returns the processed object expression
 */
export declare const mergeExtendedSelectorsIntoProperties: (variantStyles: t.ObjectExpression, meta: Metadata) => t.ObjectExpression;