export interface FrontmatterExtractionResult {
    body: string;
    frontmatter: Record<string, unknown>;
}
/** Return true when an error came from MDX or Markdown YAML frontmatter parsing. */
export declare function isFrontmatterSyntaxError(error: unknown): error is SyntaxError;
export declare function extractFrontmatter(content: string, providedFrontmatter?: Record<string, unknown>): FrontmatterExtractionResult;
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