import { type CodeMapping, type LanguagePlugin, type VirtualCode } from '@volar/language-core';
import type ts from 'typescript';
import type { URI } from 'vscode-uri';
export declare const SUPPORTED_FRONTMATTER_EXTENSIONS: {
    md: string;
    mdx: string;
    mdoc: string;
};
export declare const SUPPORTED_FRONTMATTER_EXTENSIONS_KEYS: string[];
export declare const frontmatterRE: RegExp;
export type CollectionConfig = {
    folder: URI;
    config: {
        collections: {
            hasSchema: boolean;
            name: string;
        }[];
        entries: Record<string, string>;
    };
};
export declare function getFrontmatterLanguagePlugin(collectionConfigs: CollectionConfig[]): LanguagePlugin<URI, FrontmatterHolder>;
export declare class FrontmatterHolder implements VirtualCode {
    fileName: string;
    languageId: string;
    snapshot: ts.IScriptSnapshot;
    collection: string | undefined;
    id: string;
    mappings: CodeMapping[];
    embeddedCodes: VirtualCode[];
    hasFrontmatter: boolean;
    constructor(fileName: string, languageId: string, snapshot: ts.IScriptSnapshot, collection: string | undefined);
}