docs: def disable_plugin(plugin_name):
      '''
      Disable plugin package(s).
  
      Parameters
      ----------
      plugin_name : str or list
          Plugin package(s) to disable.
  
      Raises
      ------
      IOError
          If plugin is not enabled.
      '''
      if isinstance(plugin_name, types.StringTypes):
          plugin_name = [plugin_name]
  
      # Verify all specified plugins are currently enabled.
      enabled_path = MICRODROP_CONDA_PLUGINS.joinpath('enabled')
      for name_i in plugin_name:
          plugin_path_i = enabled_path.joinpath(name_i)
          if not _islinklike(plugin_path_i) and not plugin_path_i.isdir():
              raise IOError('Plugin `{}` not found in `{}`'
                            .format(name_i, enabled_path))
  
      # All specified plugins are enabled.
  
      # Remove all specified plugins from
      # `<conda prefix>/etc/microdrop/plugins/enabled/`.
      for name_i in plugin_name:
          plugin_link_path_i = enabled_path.joinpath(name_i)
          plugin_link_path_i.unlink()
          logger.debug('Disabled plugin `%s` (i.e., removed `%s`)',
                       plugin_path_i, plugin_link_path_i)