docs: def check_used(self, pkg):
          """Check if dependencies used
          """
          used = []
          dep_path = self.meta.log_path + "dep/"
          logs = find_package("", dep_path)
          for log in logs:
              deps = Utils().read_file(dep_path + log)
              for dep in deps.splitlines():
                  if pkg == dep:
                      used.append(log)
          return used