import { Transform, TransformCallback } from 'node:stream';
import { BufferWithMeta, SymbolMetadata } from '../../types';
export declare class TransformToSvg extends Transform {
    private readonly _fontName;
    private readonly _metadata?;
    private _isHeaderRendered;
    constructor(fontName: string, metadata?: string);
    private _header;
    _transform(chunk: BufferWithMeta<SymbolMetadata>, _encoding: BufferEncoding, callback: TransformCallback): void;
    _flush(callback: TransformCallback): void;
}