code: def evaluate_true(self, X: Tensor) -> Tensor:
      return -X.pow(2).sum(dim=-1)
  
file_path: botorch/test/test_functions/test_base.py
imports: import torch
  from botorch.test_functions.base import BaseTestProblem, ConstrainedBaseTestProblem
  from botorch.utils.testing import BotorchTestCase
  from torch import Tensor
label_desc: Use image node_id 1 for calling the DummyTestProblem obj's underlying member method code with example usage: obj.evaluate_true(X) and returns: unknown