def __init__(
        self,
        rule_file_path=None,
        rule_ref=None,
        trigger_instance_file_path=None,
        trigger_instance_id=None,
    ):
        """
        :param rule_file_path: Path to the file containing rule definition.
        :type rule_file_path: ``str``

        :param trigger_instance_file_path: Path to the file containg trigger instance definition.
        :type trigger_instance_file_path: ``str``
        """
        self._rule_file_path = rule_file_path
        self._rule_ref = rule_ref
        self._trigger_instance_file_path = trigger_instance_file_path
        self._trigger_instance_id = trigger_instance_id
        self._meta_loader = MetaLoader()

        :param rule_file_path: Path to the file containing rule definition.
        :type rule_file_path: ``str``

        :param trigger_instance_file_path: Path to the file containg trigger instance definition.
        :type trigger_instance_file_path: ``str``
        
st2reactor/st2reactor/rules/tester.py