docs: def add_cc(
              self, cc_email, global_substitutions=None, is_multiple=False, p=0):
          """Adds a Cc object to the Personalization object
  
          :param to_emails: An Cc object
          :type to_emails: Cc
          :param global_substitutions: A dict of substitutions for all recipients
          :type global_substitutions: dict
          :param is_multiple: Create a new personilization for each recipient
          :type is_multiple: bool
          :param p: p is the Personalization object or Personalization object
                    index
          :type p: Personalization, integer, optional
          """
          if isinstance(cc_email, str):
              cc_email = Cc(cc_email, None)
          if isinstance(cc_email, tuple):
              cc_email = Cc(cc_email[0], cc_email[1])
          if isinstance(cc_email, Email):
              p = cc_email.personalization
          self._set_emails(
              cc_email, global_substitutions, is_multiple=is_multiple, p=p)