public PBiPredicate<V, V> getBiPredicate() {
        return this.biPredicate;
    }
Predefined {@code Predicate} values that can be used to define filters to {@code has()} and {@code where()}.

@author Marko A. Rodriguez (http://markorodriguez.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/P.java