Fetch a list of content using the Confluence Query Language (CQL).
        See: Advanced searching using CQL (https://developer.atlassian.com/display/CONFDEV/Advanced+Searching+using+CQL)
        :param cql_str (string): OPTIONAL: A cql query string to use to locate content.
        :param cql_context (string): OPTIONAL: The context to execute a cql search in,
                                     this is the json serialized form of SearchContext
        :param expand (string): OPTIONAL: A comma separated list of properties to expand on the content. Default: Empty.
        :param start (int): OPTIONAL: The start point of the collection to return. Default: 0
        :param limit (int): OPTIONAL: The limit of the number of items to return,
                                      this may be restricted by fixed system limits. Default: 25.
        :param callback: OPTIONAL: The callback to execute on the resulting data, before the method returns.
                         Default: None (no callback, raw data returned).
        :return: The JSON data returned from the content/search endpoint, or the results of the callback.
                 Will raise requests.HTTPError on bad input, potentially.

def search_content(self, cql_str=None, cql_context=None, expand=None, start=0, limit=None, callback=None):
        """
        Fetch a list of content using the Confluence Query Language (CQL).
        See: Advanced searching using CQL (https://developer.atlassian.com/display/CONFDEV/Advanced+Searching+using+CQL)
        :param cql_str (string): OPTIONAL: A cql query string to use to locate content.
        :param cql_context (string): OPTIONAL: The context to execute a cql search in,
                                     this is the json serialized form of SearchContext
        :param expand (string): OPTIONAL: A comma separated list of properties to expand on the content. Default: Empty.
        :param start (int): OPTIONAL: The start point of the collection to return. Default: 0
        :param limit (int): OPTIONAL: The limit of the number of items to return,
                                      this may be restricted by fixed system limits. Default: 25.
        :param callback: OPTIONAL: The callback to execute on the resulting data, before the method returns.
                         Default: None (no callback, raw data returned).
        :return: The JSON data returned from the content/search endpoint, or the results of the callback.
                 Will raise requests.HTTPError on bad input, potentially.
        """
        params = {}
        if cql_str:
            params["cql"] = cql_str
        if cql_context:
            params["cqlcontext"] = json.dumps(cql_context)
        if expand:
            params["expand"] = expand
        if start is not None:
            params["start"] = int(start)
        if limit is not None:
            params["limit"] = int(limit)
        return self._service_get_request("rest/api/content/search", params=params, callback=callback)