GetField.
        [Preview API] Gets information on a specific field.
        :param str field_name_or_ref_name: Field simple name or reference name
        :param str project: Project ID or project name
        :rtype: :class:`<WorkItemField> <azure.devops.v5_1.work-item-tracking.models.WorkItemField>`

def get_field(self, field_name_or_ref_name, project=None):
        """GetField.
        [Preview API] Gets information on a specific field.
        :param str field_name_or_ref_name: Field simple name or reference name
        :param str project: Project ID or project name
        :rtype: :class:`<WorkItemField> <azure.devops.v5_1.work-item-tracking.models.WorkItemField>`
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if field_name_or_ref_name is not None:
            route_values['fieldNameOrRefName'] = self._serialize.url('field_name_or_ref_name', field_name_or_ref_name, 'str')
        response = self._send(http_method='GET',
                              location_id='b51fd764-e5c2-4b9b-aaf7-3395cf4bdd94',
                              version='5.1-preview.2',
                              route_values=route_values)
        return self._deserialize('WorkItemField', response)