createUiModification method
      
Future<UiModificationIdentifiers> 
createUiModification({ 
    
- required CreateUiModificationDetails body,
Creates a UI modification. UI modification can only be created by Forge apps.
Each app can define up to 100 UI modifications. Each UI modification can define up to 1000 contexts.
Permissions required:
- None if the UI modification is created without contexts.
- Browse projects project permission for one or more projects, if the UI modification is created with contexts.
Implementation
Future<UiModificationIdentifiers> createUiModification(
    {required CreateUiModificationDetails body}) async {
  return UiModificationIdentifiers.fromJson(await _client.send(
    'post',
    'rest/api/3/uiModifications',
    body: body.toJson(),
  ));
}