public default TraversalSource withComputer(final Computer computer) {
        return this.withStrategies(new VertexProgramStrategy(computer));
    }
Add a {@link Computer} that will generate a {@link GraphComputer} from the {@link Graph} that will be used to execute the traversal.
This adds a {@link VertexProgramStrategy} to the strategies.

@param computer a builder to generate a graph computer from the graph
@return a new traversal source with updated strategies
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/TraversalSource.java