prepareRename method
Checks whether a symbol can be renamed at the given position.
Returns range and placeholder information, or null if rename is invalid.
Implementation
Future<Map<String, dynamic>?> prepareRename(
String filePath,
int line,
int character,
) async {
final response = await _sendRequest(
method: 'textDocument/prepareRename',
params: _commonParams(filePath, line, character),
);
return response['result'];
}