changeFile method
Notify content change (sends textDocument/didChange).
Implementation
Future<void> changeFile(String filePath, String content) async {
final serverName = _openFiles[filePath];
if (serverName == null) return;
final server = _servers[serverName];
if (server == null) return;
final version = (_fileVersions[filePath] ?? 0) + 1;
_fileVersions[filePath] = version;
server.sendNotification('textDocument/didChange', {
'textDocument': {'uri': _fileUri(filePath), 'version': version},
'contentChanges': [
{'text': content},
],
});
}