code: def test_risk_adjusted_reward_scheme():
      assert isinstance(
          rewards.get("risk-adjusted"), rewards.RiskAdjustedReturns
      )
  
imports: import warnings
  import tensortrade.env.default.actions
  import tensortrade.env.default.rewards
label_desc: Use image node_id 4 for calling a global function with example usage: test_risk_adjusted_reward_scheme() without return types