docs: def get_selections(pattern=None, state=None):
      '''
      View package state from the dpkg database.
  
      Returns a dict of dicts containing the state, and package names:
  
      .. code-block:: python
  
          {'<host>':
              {'<state>': ['pkg1',
                           ...
                          ]
              },
              ...
          }
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' pkg.get_selections
          salt '*' pkg.get_selections 'python-*'
          salt '*' pkg.get_selections state=hold
          salt '*' pkg.get_selections 'openssh*' state=hold
      '''
      ret = {}
      cmd = ['dpkg', '--get-selections']
      cmd.append(pattern if pattern else '*')
      stdout = __salt__['cmd.run_stdout'](cmd,
                                          output_loglevel='trace',
                                          python_shell=False)
      ret = _parse_selections(stdout)
      if state:
          return {state: ret.get(state, [])}
      return ret