old_contents: """
  This module holds the abstract `Connection` class.
  """
  import abc
  from datetime import timedelta
  
  
  class Connection(abc.ABC):
      """
      Represents an abstract connection for Telegram.
  
      Subclasses should implement the actual protocol
      being used when encoding/decoding messages.
      """
      def __init__(self, proxy=None, timeout=timedelta(seconds=5)):
          """
          Initializes a new connection.
  
          :param proxy: whether to use a proxy or not.
          :param timeout: timeout to be used for all operations.
          """
          self._proxy = proxy
          self._timeout = timeout
  
      @abc.abstractmethod
      def get_timeout(self):
          """Returns the timeout used by the connection."""
          raise NotImplementedError
  
      @abc.abstractmethod
      def is_connected(self):
          """
          Determines whether the connection is alive or not.
  
          :return: true if it's connected.
          """
          raise NotImplementedError
  
      @abc.abstractmethod
      def close(self):
          """Closes the connection."""
          raise NotImplementedError
  
      @abc.abstractmethod
      def clone(self):
          """Creates a copy of this Connection."""
          raise NotImplementedError
  
      @abc.abstractmethod
      def recv(self):
          """Receives and unpacks a message"""
          raise NotImplementedError
  
      @abc.abstractmethod
      def send(self, message):
          """Encapsulates and sends the given message"""
          raise NotImplementedError
  
new_contents: """
  This module holds the abstract `Connection` class.
  """
  import abc
  from datetime import timedelta
  
  
  class Connection(abc.ABC):
      """
      Represents an abstract connection for Telegram.
  
      Subclasses should implement the actual protocol
      being used when encoding/decoding messages.
      """
      def __init__(self, proxy=None, timeout=timedelta(seconds=5)):
          """
          Initializes a new connection.
  
          :param proxy: whether to use a proxy or not.
          :param timeout: timeout to be used for all operations.
          """
          self._proxy = proxy
          self._timeout = timeout
  
      @abc.abstractmethod
      def connect(self, ip, port):
          raise NotImplementedError
  
      @abc.abstractmethod
      def get_timeout(self):
          """Returns the timeout used by the connection."""
          raise NotImplementedError
  
      @abc.abstractmethod
      def is_connected(self):
          """
          Determines whether the connection is alive or not.
  
          :return: true if it's connected.
          """
          raise NotImplementedError
  
      @abc.abstractmethod
      def close(self):
          """Closes the connection."""
          raise NotImplementedError
  
      @abc.abstractmethod
      def clone(self):
          """Creates a copy of this Connection."""
          raise NotImplementedError
  
      @abc.abstractmethod
      def recv(self):
          """Receives and unpacks a message"""
          raise NotImplementedError
  
      @abc.abstractmethod
      def send(self, message):
          """Encapsulates and sends the given message"""
          raise NotImplementedError
  
subject: Add missing connect abstractmethod