declare namespace GatsbyTypes {
  type Maybe<T> = T | undefined;

  type Scalars = {
    ID: string;
    String: string;
    Boolean: boolean;
    Int: number;
    Float: number;
    Date: string;
    JSON: never;
  };

  type SiteSiteMetadata = {
    readonly title: Maybe<Scalars["String"]>;
    readonly description: Maybe<Scalars["String"]>;
    readonly author: Maybe<Scalars["String"]>;
    readonly siteUrl: Maybe<Scalars["String"]>;
  };
}