src/vs/workbench/services/search/node/fileSearch.ts/FileWalker/forwardData
class FileWalker:	private forwardData(stream: Readable, encoding: BufferEncoding, cb: (err: Error | null, stdout?: string) => void): StringDecoder {
		const decoder = new StringDecoder(encoding);
		stream.on('data', (data: Buffer) => {
			cb(null, decoder.write(data));
		});
		return decoder;
	}