code: def get_command(self, name):
          
  
          # fast path, no space in name.
          if ' ' not in name:
              return self.all_commands.get(name)
  
          names = name.split()
          obj = self.all_commands.get(names[0])
          if not isinstance(obj, GroupMixin):
              return obj
  
          for name in names[1:]:
              try:
                  obj = obj.all_commands[name]
              except (AttributeError, KeyError):
                  return None
  
          return obj
docs: Get a :class:`.Command` or subclasses from the internal list
          of commands.
  
          This could also be used as a way to get aliases.
  
          The name could be fully qualified (e.g. ``'foo bar'``) will get
          the subcommand ``bar`` of the group command ``foo``. If a
          subcommand is not found then ``None`` is returned just as usual.
  
          Parameters
          -----------
          name: :class:`str`
              The name of the command to get.
  
          Returns
          --------
          :class:`Command` or subclass
              The command that was requested. If not found, returns ``None``.