code: def setup(self):
      self.config = {
          "base_instrument": "USD",
          "instruments": "ETH",
          "rewards": {"size": 0},
      }
  
      class ConcreteRewardScheme(rewards.TensorTradeRewardScheme):
          def get_reward(self, env) -> float:
              pass
  
      self.concrete_class = ConcreteRewardScheme
  
file_path: tensortrade/tests/tensortrade/unit/env/default/test_rewards.py
imports: import pytest
  import numpy
  import pandas
  from collections import OrderedDict
  import tensortrade.env.default.rewards
  from tensortrade.core import TradingContext
  from tensortrade.oms.wallets import Portfolio
  from tensortrade.oms.instruments import USD
label_desc: Use image node_id 1 for calling the TestTensorTradeRewardScheme obj's underlying member method code with example usage: obj.setup() without return types