import type { GatsbyNode } from "gatsby";
/**
 * When you expose options for your plugin, it's best practice to validate the user input.
 * You can use the pluginOptionsSchema API to do this, which is powered by Joi: https://joi.dev/
 * If for example a user would forget to add the endpoint option, Gatsby will show a validation error.
 * @see https://www.gatsbyjs.com/docs/reference/config-files/gatsby-node/#pluginOptionsSchema
 * @see https://www.gatsbyjs.com/docs/how-to/plugins-and-themes/configuring-usage-with-plugin-options/
 */
export declare const pluginOptionsSchema: GatsbyNode["pluginOptionsSchema"];