[ CCode ( array_length = false , array_null_terminated = true ) ]
[ Version ( since = "0.15.5" ) ]
public string[] contact_groups { get; }
The names of all groups that currently exist.
This may be a larger set than the union of all contact_groups properties, if the connection allows groups to be empty.
This property's value is not meaningful until the contact_list_state property has become SUCCESS.
For this property to be valid, you must first call prepare_async with
the feature TP_CONNECTION_FEATURE_CONTACT_GROUPS.