public Builder expectedNumEdges(final int expectedNumEdges) {
            this.expectedNumEdges = expectedNumEdges;
            return this;
        }
Generates a synthetic network for a given out- and (optionally) in-degree distribution.

@author Matthias Broecheler (me@matthiasb.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/algorithm/generator/DistributionGenerator.java