@Override
    public Iterable<Vertex> vertices() {
        GraphCentricQuery query = constructQuery(ElementCategory.VERTEX);
        return Iterables.filter(new QueryProcessor<>(query, tx.elementProcessor), Vertex.class);
    }
@ Override public Iterable < Vertex > vertices ( ) { GraphCentricQuery query = constructQuery ( ElementCategory . VERTEX ) ; return Iterables . filter ( new QueryProcessor < > ( query , tx . elementProcessor ) , Vertex . class ) ; }
/* ---------------------------------------------------------------
Query Execution
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