GetProcessBehavior.
        [Preview API] Returns a behavior of the process.
        :param str process_id: The ID of the process
        :param str behavior_ref_name: The reference name of the behavior
        :param str expand:
        :rtype: :class:`<ProcessBehavior> <azure.devops.v5_0.work_item_tracking_process.models.ProcessBehavior>`

def get_process_behavior(self, process_id, behavior_ref_name, expand=None):
        """GetProcessBehavior.
        [Preview API] Returns a behavior of the process.
        :param str process_id: The ID of the process
        :param str behavior_ref_name: The reference name of the behavior
        :param str expand:
        :rtype: :class:`<ProcessBehavior> <azure.devops.v5_0.work_item_tracking_process.models.ProcessBehavior>`
        """
        route_values = {}
        if process_id is not None:
            route_values['processId'] = self._serialize.url('process_id', process_id, 'str')
        if behavior_ref_name is not None:
            route_values['behaviorRefName'] = self._serialize.url('behavior_ref_name', behavior_ref_name, 'str')
        query_parameters = {}
        if expand is not None:
            query_parameters['$expand'] = self._serialize.query('expand', expand, 'str')
        response = self._send(http_method='GET',
                              location_id='d1800200-f184-4e75-a5f2-ad0b04b4373e',
                              version='5.0-preview.2',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('ProcessBehavior', response)