[ Version ( since = "0.19.1" ) ]
public async Contact ensure_contact_by_id_async (Connection connection, string identifier) throws Error
Same as dup_contact_by_id_async, but prepare the contact with all features previously passed to add_contact_features.
| this |
a SimpleClientFactory object |
| connection | |
| identifier |
a string representing the contact's identifier |
| callback |
a callback to call when the operation finishes |
| user_data |
data to pass to |