class_docstr: This manager is used to load plugins in runtime env agent.
class_docstr_tok: ["This","manager","is","used","to","load","plugins","in","runtime","env","agent","."]
code: def __init__(self):
      self.plugins: Dict[str, PluginSetupContext] = {}
      plugin_config_str = os.environ.get(
          RAY_RUNTIME_ENV_PLUGINS_ENV_VAR
      )
      if plugin_config_str:
          plugin_configs = json.loads(plugin_config_str)
          self.load_plugins(plugin_configs)
  
imports: import logging
  import os
  import json
  from abc import ABC
  from typing import List, Dict, Optional, Any, Type
  from ray._private.runtime_env.context import RuntimeEnvContext
  from ray._private.runtime_env.uri_cache import URICache
  from ray._private.runtime_env.constants import RAY_RUNTIME_ENV_PLUGINS_ENV_VAR, RAY_RUNTIME_ENV_PLUGIN_DEFAULT_PRIORITY, RAY_RUNTIME_ENV_CLASS_FIELD_NAME, RAY_RUNTIME_ENV_PRIORITY_FIELD_NAME, RAY_RUNTIME_ENV_PLUGIN_MIN_PRIORITY, RAY_RUNTIME_ENV_PLUGIN_MAX_PRIORITY
  from ray.util.annotations import DeveloperAPI
  from ray._private.utils import import_attr
label_desc: Use image node_id 1 to create a new RuntimeEnvPluginManager object  with example: obj = RuntimeEnvPluginManager()