code: def file_size(path: path_type, storage_options: Dict = None) -> int:
      fs = get_fs(path, storage_options)
      return fs.stat(path)["size"]
  
file_path: mars/mars/lib/filesystem/core.py
imports: import glob
  import os
  from typing import Dict, List
  from urllib.parse import urlparse
  from ..compression import compress
  from .base import path_type, FileSystem
  from .local import LocalFileSystem
  from .oss import OSSFileSystem
label_desc: Use image node_id 4 for calling a global function with example usage: file_size(path, storage_options) and returns: fs