code: def import_obj(cls, i_datasource, import_time=None):
          
          def lookup_datasource(d):
              return db.session.query(DruidDatasource).filter(
                  DruidDatasource.datasource_name == d.datasource_name,
                  DruidCluster.cluster_name == d.cluster_name,
              ).first()
  
          def lookup_cluster(d):
              return db.session.query(DruidCluster).filter_by(
                  cluster_name=d.cluster_name).one()
          return import_datasource.import_datasource(
              db.session, i_datasource, lookup_cluster, lookup_datasource,
              import_time)
docs: Imports the datasource from the object to the database.
  
           Metrics and columns and datasource will be overridden if exists.
           This function can be used to import/export dashboards between multiple
           superset instances. Audit metadata isn't copies over.