old_contents: # Copyright (c) 2014, Guillermo López-Anglada. Please see the AUTHORS file for details.
  # All rights reserved. Use of this source code is governed by a BSD-style
  # license that can be found in the LICENSE file.)
  
  from Dart.sublime_plugin_lib.path import extension_equals
  
  
  def is_view_dart_script(view):
      """Checks whether @view looks like a Dart script file.
  
      Returns `True` if @view's file name ends with '.dart'.
      Returns `False` if @view isn't saved on disk.
      """
      try:
          if view.file_name() is None:
              return False
          return is_dart_script(view.file_name())
      except AttributeError:
          # view is a path
          return is_dart_script(view)
  
  
  def is_pubspec(path_or_view):
      """Returns `True` if @path_or_view is 'pubspec.yaml'.
      """
      try:
          if path_or_view.file_name() is None:
              return
          return path_or_view.file_name().endswith('pubspec.yaml')
      except AttributeError:
          return path_or_view.endswith('pubspec.yaml')
  
  
  def is_dart_script(path):
      return extension_equals(path, '.dart')
  
  
  # TODO(guillermooo): duplicated (find_pubspec)?
  def find_pubspec_path(path, original=None):
      """Locates the directory containing a pubspec.yaml file.
  
      Returns (str, bool): A path, and whether a pubspec.yaml was found. If no
      pubspec.yaml was found, the path will be passed-in path.
      """
      if os.path.exists(os.path.join(path, 'pubspec.yaml')):
          return path
  
      if original is None:
          original = path
  
      p = os.path.dirname(path)
  
      # Reached drive unit; stop.
      if p == os.path.dirname(p):
          return
  
      return find_pubspec_path(p, original)
  
new_contents: # Copyright (c) 2014, Guillermo López-Anglada. Please see the AUTHORS file for details.
  # All rights reserved. Use of this source code is governed by a BSD-style
  # license that can be found in the LICENSE file.)
  
  import os
  from Dart.sublime_plugin_lib.path import extension_equals
  
  
  def is_view_dart_script(view):
      """Checks whether @view looks like a Dart script file.
  
      Returns `True` if @view's file name ends with '.dart'.
      Returns `False` if @view isn't saved on disk.
      """
      try:
          if view.file_name() is None:
              return False
          return is_dart_script(view.file_name())
      except AttributeError:
          # view is a path
          return is_dart_script(view)
  
  
  def is_pubspec(path_or_view):
      """Returns `True` if @path_or_view is 'pubspec.yaml'.
      """
      try:
          if path_or_view.file_name() is None:
              return
          return path_or_view.file_name().endswith('pubspec.yaml')
      except AttributeError:
          return path_or_view.endswith('pubspec.yaml')
  
  
  def is_dart_script(path):
      return extension_equals(path, '.dart')
  
  
  # TODO(guillermooo): duplicated (find_pubspec)?
  def find_pubspec_path(path, original=None):
      """Locates the directory containing a pubspec.yaml file.
  
      Returns (str, bool): A path, and whether a pubspec.yaml was found. If no
      pubspec.yaml was found, the path will be passed-in path.
      """
      if os.path.exists(os.path.join(path, 'pubspec.yaml')):
          return path
  
      if original is None:
          original = path
  
      p = os.path.dirname(path)
  
      # Reached drive unit; stop.
      if p == os.path.dirname(p):
          return
  
      return find_pubspec_path(p, original)
  
subject: add missing import