docs: def find(self, flag):
          """Find installed Slackware packages
          """
          matching, pkg_cache, match_cache = 0, "", ""
          print("\nPackages with matching name [ {0}{1}{2} ]\n".format(
              self.meta.color["CYAN"], ", ".join(self.binary),
              self.meta.color["ENDC"]))
          for pkg in self.binary:
              for match in find_package("", self.meta.pkg_path):
                  if "--case-ins" in flag:
                      pkg_cache = pkg.lower()
                      match_cache = match.lower()
                  else:
                      pkg_cache = pkg
                      match_cache = match
                  if pkg_cache in match_cache:
                      matching += 1
                      self._sizes(match)
                      print("[ {0}installed{1} ] [ {2} ] - {3}".format(
                          self.meta.color["GREEN"], self.meta.color["ENDC"],
                          self.file_size, match))
          if matching == 0:
              message = "Can't find"
              self.msg.pkg_not_found("", ", ".join(self.binary), message, "\n")
              raise SystemExit(1)
          else:
              self._calc_sizes()
              print("\nFound summary")
              print("=" * 79)
              print("{0}Total found {1} matching packages.{2}".format(
                  self.meta.color["GREY"], matching, self.meta.color["ENDC"]))
              print("{0}Size of installed packages {1} {2}.{3}\n".format(
                  self.meta.color["GREY"], round(self.size, 2), self.unit,
                  self.meta.color["ENDC"]))