parse method
Implementation
ParsedContent parse(String raw) {
final text = raw.replaceAll('\r\n', '\n');
if (!text.startsWith('---\n')) {
return (data: const {}, body: text.trim());
}
final end = text.indexOf('\n---', 4);
if (end == -1) {
return (data: const {}, body: text.trim());
}
final fm = text.substring(4, end);
final body = text.substring(end + 4).trimLeft();
final yaml = loadYaml(fm);
return (data: _toMap(yaml), body: body);
}