parameters: (self, transport, protocol, sslcontext, *,
                          server_side=False,
                          server_hostname=None,
                          ssl_handshake_timeout=None)
docstring: Upgrade a transport to TLS.
  
          Return a new transport that *protocol* should start using
          immediately.
docstring_summary: Upgrade a transport to TLS.
docstring_tokens: Upgrade a transport to TLS .
function: async def start_tls(self, transport, protocol, sslcontext, *,
                          server_side=False,
                          server_hostname=None,
                          ssl_handshake_timeout=None):
          """Upgrade a transport to TLS.
  
          Return a new transport that *protocol* should start using
          immediately.
          """
          raise NotImplementedError
function_tokens: async def start_tls ( self , transport , protocol , sslcontext , * , server_side = False , server_hostname = None , ssl_handshake_timeout = None ) : raise NotImplementedError