import type { PartialConfig } from './config';
import type { TemplateFunction } from './compile';
import type { CallbackFn } from './file-handlers';
/**
 * Render a template
 *
 * If `template` is a string, Eta will compile it to a function and then call it with the provided data.
 * If `template` is a template function, Eta will call it with the provided data.
 *
 * If `config.async` is `false`, Eta will return the rendered template.
 *
 * If `config.async` is `true` and there's a callback function, Eta will call the callback with `(err, renderedTemplate)`.
 * If `config.async` is `true` and there's not a callback function, Eta will return a Promise that resolves to the rendered template.
 *
 * If `config.cache` is `true` and `config` has a `name` or `filename` property, Eta will cache the template on the first render and use the cached template for all subsequent renders.
 *
 * @param template Template string or template function
 * @param data Data to render the template with
 * @param config Optional config options
 * @param cb Callback function
 */
export default function render(template: string | TemplateFunction, data: object, config?: PartialConfig, cb?: CallbackFn): string | Promise<string> | void;
/**
 * Render a template asynchronously
 *
 * If `template` is a string, Eta will compile it to a function and call it with the provided data.
 * If `template` is a function, Eta will call it with the provided data.
 *
 * If there is a callback function, Eta will call it with `(err, renderedTemplate)`.
 * If there is not a callback function, Eta will return a Promise that resolves to the rendered template
 *
 * @param template Template string or template function
 * @param data Data to render the template with
 * @param config Optional config options
 * @param cb Callback function
 */
export declare function renderAsync(template: string | TemplateFunction, data: object, config?: PartialConfig, cb?: CallbackFn): string | Promise<string> | void;
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