use serde::{Deserialize, Serialize};use serde_json::Value; #[serde_with::skip_serializing_none]#[derive(Deserialize, Serialize, Debug, Default, Clone)]#[serde(rename_all = "camelCase")]pub struct DocumentMetadata {    // firecrawl specific    #[serde(rename = "sourceURL")]    pub source_url: String,    pub status_code: u16,    pub error: Option<String>,     // basic meta tags    pub title: Option<String>,    pub description: Option<String>,    pub language: Option<String>,    pub keywords: Option<String>,    pub robots: Option<String>,     // og: namespace    pub og_title: Option<String>,    pub og_description: Option<String>,    pub og_url: Option<String>,    pub og_image: Option<String>,    pub og_audio: Option<String>,    pub og_determiner: Option<String>,    pub og_locale: Option<String>,    pub og_locale_alternate: Option<Vec<String>>,    pub og_site_name: Option<String>,    pub og_video: Option<String>,     // article: namespace    pub article_section: Option<String>,    pub article_tag: Option<String>,    pub published_time: Option<String>,    pub modified_time: Option<String>,     // dc./dcterms. namespace    pub dcterms_keywords: Option<String>,    pub dc_description: Option<String>,    pub dc_subject: Option<String>,    pub dcterms_subject: Option<String>,    pub dcterms_audience: Option<String>,    pub dc_type: Option<String>,    pub dcterms_type: Option<String>,    pub dc_date: Option<String>,    pub dc_date_created: Option<String>,    pub dcterms_created: Option<String>,} #[serde_with::skip_serializing_none]#[derive(Deserialize, Serialize, Debug, Default, Clone)]#[serde(rename_all = "camelCase")]pub struct Document {    /// A list of the links on the page, present if `ScrapeFormats::Markdown` is present in `ScrapeOptions.formats`. (default)    pub markdown: Option<String>,     /// The HTML of the page, present if `ScrapeFormats::HTML` is present in `ScrapeOptions.formats`.    ///    /// This contains HTML that has non-content tags removed. If you need the original HTML, use `ScrapeFormats::RawHTML`.    pub html: Option<String>,     /// The raw HTML of the page, present if `ScrapeFormats::RawHTML` is present in `ScrapeOptions.formats`.    ///    /// This contains the original, untouched HTML on the page. If you only need human-readable content, use `ScrapeFormats::HTML`.    pub raw_html: Option<String>,     /// The URL to the screenshot of the page, present if `ScrapeFormats::Screenshot` or `ScrapeFormats::ScreenshotFullPage` is present in `ScrapeOptions.formats`.    pub screenshot: Option<String>,     /// A list of the links on the page, present if `ScrapeFormats::Links` is present in `ScrapeOptions.formats`.    pub links: Option<Vec<String>>,     /// The extracted data from the page, present if `ScrapeFormats::Extract` is present in `ScrapeOptions.formats`.    /// If `ScrapeOptions.extract.schema` is `Some`, this `Value` is guaranteed to match the provided schema.    pub extract: Option<Value>,     /// The metadata from the page.    pub metadata: DocumentMetadata,     /// Can be present if `ScrapeFormats::Extract` is present in `ScrapeOptions.formats`.    /// The warning message will contain any errors encountered during the extraction.    pub warning: Option<String>,}