code: def install(self):
          
          packages = self.packages()
          if packages:
              print("")   # new line at start
              for pkg in packages:
                  ver = SBoGrep(pkg).version()
                  prgnam = "{0}-{1}".format(pkg, ver)
                  if find_package(prgnam, self.meta.output):
                      binary = slack_package(prgnam)
                      PackageManager(binary).upgrade(flag="--install-new")
                  else:
                      print("\nPackage {0} not found in the {1} for "
                            "installation\n".format(prgnam, self.meta.output))
          else:
              print("\nPackages not found in the queue for installation\n")
              raise SystemExit(1)
docs: Install packages from queue