Retrieves all vertices connected to this query's central vertex by edges matching the conditions defined in this query.
No guarantee is made as to the order in which the vertices are listed. Use {@link com.thinkaurelius.titan.core.VertexList#sort()}to sort by vertex idAuthorities most efficiently.
The query engine will determine the most efficient way to retrieve the vertices that match this query.
@return A list of all vertices connected to this query's central vertex by matching edges