code: def visible_suite_paths(cls, paths=None):
          
          suite_paths = []
          if paths is None:
              paths = os.getenv("PATH", "").split(os.pathsep)
          for path in paths:
              if path and os.path.isdir(path):
                  path_ = os.path.dirname(path)
                  filepath = os.path.join(path_, "suite.yaml")
                  if os.path.isfile(filepath):
                      suite_paths.append(path_)
          return suite_paths
docs: Get a list of paths to suites that are visible on $PATH.
  
          Returns:
              List of str.