@loader_option()
def undefer_group(loadopt, name):
 return loadopt.set_column_strategy('*', None, {('undefer_group_%s' % name): True}, opts_only=True)

@ loader_option ( ) def undefer_group ( loadopt , name ) : return loadopt . set_column_strategy ( '*' , None , { ( 'undefer_group_%s' % name ) : True } , opts_only = True )
indicate that columns within the given deferred group name should be undeferred .