code: def replace_headers(self, header_name, value, *values):
  		
  		if self.__ro_flag:
  			raise RuntimeError('ro')
  		header_name = self.normalize_name(header_name)
  		self.remove_headers(header_name)
  		self.add_headers(header_name, value, *values)
docs: Replace header value with specified value and/or values
  
  		:param header_name: target header
  		:param value: new header value
  		:param values: additional header values (in a result request/response must be concatenated by the coma \
  		or by the separate header string)
  		:return: None