get
Retrieves a contact based on their unique identifier.
This method searches for a contact with the specified unique identifier. The contact can be retrieved from the cache if it's present in the user's roster, designated as a personal contact, or fetched from the server using the fetchContactDataById method.
For a Rainbow contact, the unique ID corresponds to its JID; for contacts in other directories (office, office365, personal contacts, and phone contacts), it's a calculated identifier.
Return
The IRainbowContact object corresponding to the specified unique identifier, or null if the contact is not found.
Parameters
unique
The unique identifier of the contact to retrieve.