code: def __init__(
      self,
      client,
      refresh_time_ns: int = FIVE_SECONDS_NS,
      max_size: int = 100,
  ):
      self.client = client
      self.secret_cache = TimeLimitedMaxSizeCache(
          self._get_secret_from_k8s,
          refresh_time_ns,
          max_size,
          "K8s secret cache",
      )
      self.service_account_cache = TimeLimitedMaxSizeCache(
          self._get_service_account_from_k8s,
          refresh_time_ns,
          max_size,
          "K8s service account cache",
      )
      self.k8s_timeout = float(
          os.environ.get("KUBERNETES_TIMEOUT_IN_SECONDS", 5.0)
      )
  
imports: import os
  from typing import Tuple
  from hailtop.utils import retry_transient_errors
  from .time_limited_max_size_cache import TimeLimitedMaxSizeCache
label_desc: Use image node_id 1 to create a new K8sCache object  with example: obj = K8sCache(client, refresh_time_ns, max_size)