class_docstr: Support for `Visual Chart <www.visualchart.com>`_ binary on-disk files for
  both daily and intradaily formats.
  
  Note:
  
    - ``dataname``: Market code displayed by Visual Chart. Example: 015ES for
      EuroStoxx 50 continuous future
code: def stop(self):
      if self.f is not None:
          self.f.close()
          self.f = None
  
file_path: backtrader/backtrader/feeds/vchartfile.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from datetime import datetime
  from struct import unpack
  import os.path
  import backtrader
  from backtrader import date2num
label_desc: Use image node_id 2 for calling the VChartFile obj's underlying member method code with example usage: obj.stop() without return types