A physical person, aggregated from the various Personas the person might have,
such as their different IM addresses or vCard entries. An individual must always contain at least one
Persona.
When choosing the values of single-valued properties (such as Individual.alias and Individual.avatar; but not multi-
valued properties such as Individual.groups and Individual.im_addresses) from the
Personas in the individual to present as the values of those properties of the
individual, it is guaranteed that if the individual contains a persona from the primary persona store (see
IndividualAggregator.primary_store), its property values
will be chosen above all others. This means that any changes to property values made through folks (which are normally written to the primary
store) will always be used by Folks.Individuals.
No further guarantees are made about the order of preference used for choosing which property values to use for the
Folks.Individual, other than that the order may vary between properties, but is guaranteed to be stable for a given property.
Emitted when one or more
Personas are added to or removed from the Individual. As the parameters are
(unordered) sets, the orders of their elements are undefined.