code: def init_group(store, overwrite=False, path=None, chunk_store=None):
      
  
      # normalize path
      path = normalize_storage_path(path)
  
      # ensure parent group initialized
      _require_parent_group(path, store=store, chunk_store=chunk_store,
                            overwrite=overwrite)
  
      # initialise metadata
      _init_group_metadata(store=store, overwrite=overwrite, path=path,
                           chunk_store=chunk_store)
docs: Initialize a group store. Note that this is a low-level function and there should be no
      need to call this directly from user code.
  
      Parameters
      ----------
      store : MutableMapping
          A mapping that supports string keys and byte sequence values.
      overwrite : bool, optional
          If True, erase all data in `store` prior to initialisation.
      path : string, optional
          Path under which array is stored.
      chunk_store : MutableMapping, optional
          Separate storage for chunks. If not provided, `store` will be used
          for storage of both chunks and metadata.