class_docstr: A Branin ``BackendSimulatorTimestampMapMetric`` with a multiplicative
  factor of ``1 - exp(-rate * t)`` where ``t`` is the runtime of the trial.
docstr: The ``BraninTimestampMapMetric`` integrated with the backend simulator.
  
  Args:
      name: Name of the metric.
      param_names: An ordered list of names of parameters to be passed
          to the deterministic function.
      noise_sd: Scale of normal noise added to the function result.
      lower_is_better: Flag for metrics which should be minimized.
      rate: Parameter of the multiplicative factor.
      delta_t: The time delta between intermediate results, used in
          ``convert_to_timestamps``.
code: def __init__(
      self,
      name: str,
      param_names: List[str],
      noise_sd: float = 0.0,
      lower_is_better: Optional[bool] = True,
      cache_evaluations: bool = True,
      rate: float = 0.5,
      delta_t: float = 1.0,
  ) -> None:
      """The ``BraninTimestampMapMetric`` integrated with the backend simulator.
  
      Args:
          name: Name of the metric.
          param_names: An ordered list of names of parameters to be passed
              to the deterministic function.
          noise_sd: Scale of normal noise added to the function result.
          lower_is_better: Flag for metrics which should be minimized.
          rate: Parameter of the multiplicative factor.
          delta_t: The time delta between intermediate results, used in
              ``convert_to_timestamps``.
      """
      BackendSimulatorTimestampMapMetric.__init__(
          self,
          name=name,
          param_names=param_names,
          noise_sd=noise_sd,
          lower_is_better=lower_is_better,
          cache_evaluations=cache_evaluations,
      )
      self.rate = rate
      self.delta_t = delta_t
      self._timestamp = -1
  
file_path: Ax/ax/utils/testing/metrics/branin_backend_map.py
imports: from typing import List, Optional
  import numpy
  from ax.metrics.branin_map import BraninTimestampMapMetric
  from ax.utils.testing.metrics.backend_simulator_map import BackendSimulatorTimestampMapMetric
label_desc: Use image node_id 1 to create a new BraninBackendMapMetric object from inherited base classes: BackendSimulatorTimestampMapMetric, BraninTimestampMapMetric with example: obj = BraninBackendMapMetric(name, param_names, noise_sd, lower_is_better, cache_evaluations, rate, delta_t)