code: public GraphSearch configure(int policy, boolean enforce) {
  		if (enforce) {
  			decisionType = GraphAssignment.graph_enforcer;
  		} else {
  			decisionType = GraphAssignment.graph_remover;
  		}
  		mode = policy;
  		return this;
  	}
docs: Configures the search
  
  @param policy  way to select arcs
  @param enforce true if a decision is an arc enforcing
  false if a decision is an arc removal