docs: def content(self, content):
          """
          Sets the content of this SupportLevelPage.
  
          :param content: The content of this SupportLevelPage.
          :type: list[str]
          """
          allowed_values = ["UNRELEASED", "EARLYACCESS", "SUPPORTED", "EXTENDED_SUPPORT", "EOL"]
          if not set(content).issubset(set(allowed_values)):
              raise ValueError(
                  "Invalid values for `content` [{0}], must be a subset of [{1}]"
                  .format(", ".join(map(str, set(content)-set(allowed_values))),
                          ", ".join(map(str, allowed_values)))
              )
  
          self._content = content