code: def get_command_signature(self, command):
          
  
          parent = command.full_parent_name
          if len(command.aliases) > 0:
              aliases = '|'.join(command.aliases)
              fmt = '[%s|%s]' % (command.name, aliases)
              if parent:
                  fmt = parent + ' ' + fmt
              alias = fmt
          else:
              alias = command.name if not parent else parent + ' ' + command.name
  
          return '%s%s %s' % (self.clean_prefix, alias, command.signature)
docs: Retrieves the signature portion of the help page.
  
          Parameters
          ------------
          command: :class:`Command`
              The command to get the signature of.
  
          Returns
          --------
          :class:`str`
              The signature for the command.