old_contents: from __future__ import absolute_import, unicode_literals
  
  
  # http://stackoverflow.com/a/22723724/1798491
  class Enum(object):
      def __init__(self, *elements):
          self.elements = tuple(elements)
  
      def __getattr__(self, name):
          if name not in self.elements:
              raise AttributeError("'Enum' has no attribute '{}'".format(name))
  
          return name
  
  
  # https://github.com/facebook/draft-js/blob/master/src/model/constants/DraftBlockType.js
  class BLOCK_TYPES:
      UNSTYLED = 'unstyled'
      HEADER_ONE = 'header-one'
      HEADER_TWO = 'header-two'
      HEADER_THREE = 'header-three'
      HEADER_FOUR = 'header-four'
      HEADER_FIVE = 'header-five'
      HEADER_SIX = 'header-six'
      UNORDERED_LIST_ITEM = 'unordered-list-item'
      ORDERED_LIST_ITEM = 'ordered-list-item'
      BLOCKQUOTE = 'blockquote'
      PULLQUOTE = 'pullquote'
      CODE = 'code-block'
      ATOMIC = 'atomic'
  
  
  ENTITY_TYPES = Enum('LINK', 'IMAGE', 'HORIZONTAL_RULE')
  
  INLINE_STYLES = Enum('BOLD', 'CODE', 'ITALIC', 'STRIKETHROUGH', 'UNDERLINE')
  
new_contents: from __future__ import absolute_import, unicode_literals
  
  
  # http://stackoverflow.com/a/22723724/1798491
  class Enum(object):
      def __init__(self, *elements):
          self.elements = tuple(elements)
  
      def __getattr__(self, name):
          if name not in self.elements:
              raise AttributeError("'Enum' has no attribute '{}'".format(name))
  
          return name
  
  
  # https://github.com/facebook/draft-js/blob/master/src/model/constants/DraftBlockType.js
  class BLOCK_TYPES:
      UNSTYLED = 'unstyled'
      HEADER_ONE = 'header-one'
      HEADER_TWO = 'header-two'
      HEADER_THREE = 'header-three'
      HEADER_FOUR = 'header-four'
      HEADER_FIVE = 'header-five'
      HEADER_SIX = 'header-six'
      UNORDERED_LIST_ITEM = 'unordered-list-item'
      ORDERED_LIST_ITEM = 'ordered-list-item'
      BLOCKQUOTE = 'blockquote'
      CODE = 'code-block'
      ATOMIC = 'atomic'
  
  
  ENTITY_TYPES = Enum('LINK', 'IMAGE', 'HORIZONTAL_RULE')
  
  INLINE_STYLES = Enum('BOLD', 'CODE', 'ITALIC', 'STRIKETHROUGH', 'UNDERLINE')
  
subject: Remove unused pullquote block type