code: def test_Init(self) -> None:
      arm = Arm(parameters={"y": 0.25, "x": 0.75, "z": 75})
      self.assertEqual(
          str(arm), "Arm(parameters={'y': 0.25, 'x': 0.75, 'z': 75})"
      )
  
      arm = Arm(
          parameters={"y": 0.25, "x": 0.75, "z": 75}, name="status_quo"
      )
      self.assertEqual(
          str(arm),
          "Arm(name='status_quo', parameters={'y': 0.25, 'x': 0.75, 'z': 75})",
      )
  
file_path: Ax/ax/core/tests/test_arm.py
imports: from ax.core.arm import Arm
  from ax.utils.common.testutils import TestCase
label_desc: Use image node_id 2 for calling the ArmTest obj's underlying member method code with example usage: obj.test_Init() without return types