Adds an not condition to the query.
The not() function adds a not condition to a ContactsQueryBuilder. A query
with a not returns all the items that match the query as defined up to
the not function, but don't match the query passed to the not function.
If the query only contains a not() function, it returns all the items
that don't match the query defined by the not method.
Contains functionality for refining a contacts query.
The ContactsQueryBuilder functions enable you to run, sort, filter, and control
which results a query returns.
Typically, you build a query using queryContacts() function,
refine the query by chaining ContactsQueryBuilder functions, and then execute the
query by chaining the find() function.