class_docstr: This manager is used to load plugin json schemas.
code: def _load_default_schemas(cls):
      schema_json_files = list()
      for root, _, files in os.walk(cls.default_schema_path):
          for f in files:
              if f.endswith(RAY_RUNTIME_ENV_PLUGIN_SCHEMA_SUFFIX):
                  schema_json_files.append(os.path.join(root, f))
          logger.debug(
              f"Loading the default runtime env schemas: {schema_json_files}."
          )
          cls._load_schemas(schema_json_files)
  
file_path: ray/python/ray/_private/runtime_env/plugin_schema_manager.py
imports: import os
  import logging
  import jsonschema
  from typing import List
  import json
  from ray._private.runtime_env.constants import RAY_RUNTIME_ENV_PLUGIN_SCHEMAS_ENV_VAR, RAY_RUNTIME_ENV_PLUGIN_SCHEMA_SUFFIX
label_desc: Use image node_id 2 for calling the RuntimeEnvPluginSchemaManager obj's underlying member method code with example usage: obj._load_default_schemas(cls) without return types