code: def ucb_decision_plan():
      op = UCB(method="UCB1", batch_size=8)
      return DecisionPlanBuilder().set_root(op).build()
  
imports: from reagent.serving.config.builder import DecisionPlanBuilder, EpsilonGreedyRanker, export, Frechet, InputFromRequest, Softmax, SoftmaxRanker, UCB
label_desc: Use image node_id 5 for calling a global function with example usage: ucb_decision_plan() and returns: DecisionPlanBuilder