editFile = (filePath, replacer) => {
	const content = fs.readFileSync(filePath, 'utf-8');
	if (!originalFiles.has(filePath)) {
		originalFiles.set(filePath, content);
	}
	const newContent = replacer(content);
	fs.writeFileSync(filePath, newContent);
}
@param {string} filePath
@param {(content: string) => string} replacer