export type TuiMarkdownImageSource = Readonly<{
    src: string;
    mime?: string;
    base64?: string;
}>;
export type TuiMarkdownImageDimensions = Readonly<{
    width: number;
    height: number;
}>;
export declare function sanitizeMarkdownImageSource(src: unknown): TuiMarkdownImageSource | null;
export declare function readMarkdownImageDimensions(base64: string | undefined): TuiMarkdownImageDimensions | null;