docs: def dir(self, filetype, **kwargs):
          """Return the directory containing a file of a given type.
  
          Parameters
          ----------
          filetype : str
              File type parameter.
  
          Returns
          -------
          dir : str
              Directory containing the file.
          """
  
          full = kwargs.get('full', None)
          if not full:
              full = self.full(filetype, **kwargs)
  
          return os.path.dirname(full)