content: import importlib
  
  __modules__ = {}
  
  
  def register(name):
      def decorator(cls):
          if name in __modules__:
              raise ValueError(
                  f"Module {name} already exists! Names of extensions conflict!"
              )
          else:
              __modules__[name] = cls
          return cls
  
      return decorator
  
  
  def find(name):
      if name in __modules__:
          return __modules__[name]
      else:
          try:
              module_string = ".".join(name.split(".")[:-1])
              cls_name = name.split(".")[-1]
              module = importlib.import_module(module_string, package=None)
              return getattr(module, cls_name)
          except Exception as e:
              raise ValueError(f"Module {name} not found!")
  
  
  ###  grammar sugar for logging utilities  ###
  import logging
  
  logger = logging.getLogger("pytorch_lightning")
  
  from pytorch_lightning.utilities.rank_zero import (
      rank_zero_debug,
      rank_zero_info,
      rank_zero_only,
  )
  
  debug = rank_zero_debug
  info = rank_zero_info
  
  
  @rank_zero_only
  def warn(*args, **kwargs):
      logger.warn(*args, **kwargs)
  
  
  from . import data, models, systems
  