old_contents: import os
  
  def foo():
  	"""
  	This is crappy function. should be removed using git checkout
  	"""
  	return None
  
  def bar():
  	"""
  	one more placeholder function for future usage. this is conflict line.
  	"""
  	return set() # Considering this data-structure is cool decision.
  
  
  class LinkedList():
  
      def __init__(self):
          self.data = []
          pass
  
  
      def add(self, data):
          pass
  
      def delete(self, index):
          pass
  
      def __str__(self):
          pass
  
      def __len__(self):
          return self.data.__len__()
  
  def main():
  	pass
  
  if __name__ == '__main__':
  	main()
  
new_contents: import os
  
  def foo():
  	"""
  	This is crappy function. should be removed using git checkout
  	"""
  	return None
  
  def bar():
  	"""
  	one more placeholder function for future usage. this is conflict line.
  	"""
  	return set() # Considering this data-structure is cool decision.
  
  
  class LinkedList():
  
      def __init__(self):
          self.data = []
          pass
  
  
      def add(self, data):
          pass
          
      def size():
      	pass
  
      def delete(self, index):
          pass
  
      def __str__(self):
          pass
  
      def __len__(self):
          return self.data.__len__()
  
  def main():
  	pass
  
  if __name__ == '__main__':
  	main()
  
subject: add size method