old_contents: """
      pyexcel_text
      ~~~~~~~~~~~~~~~~~~~
  
      Provide text output
  
      :copyright: (c) 2014-2016 by C. W.
      :license: New BSD
  """
  from pyexcel.internal.common import PyexcelPluginChain
  
  
  PyexcelPluginChain(__name__).add_a_renderer(
      relative_plugin_class_path='_text.Tabulater',
      file_types=[
          'html',
          'simple',
          'plain',
          'grid',
          'pipe',
          'orgtbl',
          'rst',
          'mediawiki',
          'latex',
          'latex_booktabs'
      ],
      stream_type='string'
  ).add_a_renderer(
      relative_plugin_class_path='_json.Jsonifier',
      file_types=['json'],
      stream_type='string'
  )
  
new_contents: """
      pyexcel_text
      ~~~~~~~~~~~~~~~~~~~
  
      Provide text output
  
      :copyright: (c) 2014-2016 by C. W.
      :license: New BSD
  """
  from pyexcel.plugins import PyexcelPluginChain
  
  
  PyexcelPluginChain(__name__).add_a_renderer(
      relative_plugin_class_path='_text.Tabulater',
      file_types=[
          'html',
          'simple',
          'plain',
          'grid',
          'pipe',
          'orgtbl',
          'rst',
          'mediawiki',
          'latex',
          'latex_booktabs'
      ],
      stream_type='string'
  ).add_a_renderer(
      relative_plugin_class_path='_json.Jsonifier',
      file_types=['json'],
      stream_type='string'
  )
  
subject: update plugin interface