How would this Groovy example look in Java? I can't find the equivalent to '_' in the Tinkerpop3 documentation...
g.V().match('a',
__.as('a').out('created').as('b'),
__.as('b').has('name', 'lop'),
__.as('b').in('created').as('c'),
__.as('c').has('age', 29)).
select('a', 'c').by('name')