check if value appears within list created from key() step in gremlin

I have a vertex that has a 'title' property. I have other vertices that have outgoing edges that have multiple properties. I'm trying to find vertices that have outgoing edges where the 'title' property value is a property key on the edge.

For example Vertex A has property {'title': ['lebron']} and Edge B has property {'lebron': 'basketball'}.

This is the example graph I have:

g.addV('person').property(id, 'bob')
g.addV('person').property(id, 'alice').addE().to(__.V('bob')).property('lebron', 'basketball')
g.addV('player').property('title', 'lebron').addE().from(__.V('bob'))

This is the query I currently came up with that isn't working:

   g
    .V('alice')
    .outE()
    .as('b')
    .otherV()
    .hasId('bob')
    .as('c')
    .select('b')
    .properties()
    .key()
    .fold()
    .as('k')
    .select('c')
    .outE()
    .otherV()
    .has('title', within('k')))
    .valueMap('title')
    .toList(); 

Try this:

g
.V('alice')
.outE()
.as('b')
.otherV()
.hasId('bob')
.as('c')
.select('b')
.aggregate('keys').by(properties().key())
.select('c')
.out()
.where(values().where(within('keys')))
.valueMap('title')
.toList()