code: def usecache(cls, onoff):
      cls._icacheuse = onoff
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from .utils.py3 import range, with_metaclass
  from .lineiterator import LineIterator, IndicatorBase
  from .lineseries import LineSeriesMaker, Lines
  from .metabase import AutoInfoClass
label_desc: Use image node_id 2 for calling the MetaIndicator obj's underlying member method code with example usage: obj.usecache(cls, onoff) without return types