import type { GatsbyNode } from "gatsby";
/**
 * By default Gatsby, infers the data types for each node. This can be sometimes brittle or lead to hard-to-debug errors.
 * However, you as the source plugin author should explicitly define the data types. This way you override the inference.
 * This has multiple benefits:
 * - All data types are correct and consistent across all nodes
 * - Users can have optional data/missing data. With inference this would break builds, with explicit data types it will work
 * - You can set up relationships between nodes
 *
 * Important: For Valhalla, you need to explicitly define the data types for all nodes.
 * @see https://www.gatsbyjs.com/docs/reference/graphql-data-layer/schema-customization/#explicitly-defining-data-types
 * @see https://www.gatsbyjs.com/docs/reference/config-files/gatsby-node/#createSchemaCustomization
 */
export declare const createSchemaCustomization: GatsbyNode[`createSchemaCustomization`];