docs: def from_tuple(cls, queries):
          """Create a ``Domain`` given a set of complex query tuples.
  
          Args:
              queries (iter): An iterator of complex queries. Each iteration
                  should contain either:
  
                  * A data-set compatible with :func:`~domain.Domain.add_query`
                  * A string to switch the join type
  
                  Example::
  
                      [('subject', 'Test1'),
                       'OR',
                       ('subject', 'Test2')',
                       ('subject', 'Test3')',
                       ]
                      # The above is equivalent to:
                      #    subject:'Test1' OR subject:'Test2' OR subject:'Test3'
  
                      [('modified_at', datetime(2017, 01, 01)),
                       ('status', 'active'),
                       ]
                      # The above is equivalent to:
                      #    modified_at:[2017-01-01T00:00:00Z TO *]
                      #    AND status:"active"
  
          Returns:
              Domain: A domain representing the input queries.
          """
          domain = cls()
          join_with = cls.AND
          for query in queries:
              if query in [cls.OR, cls.AND]:
                  join_with = query
              else:
                  domain.add_query(query, join_with)
          return domain