original_docstring: 
          Closes the connection with the serial port.
          :return: None.
          
docstring: Closes the connection with the serial port.
docstring_tokens: Closes the connection with the serial port .
code: def close_connection(self):
          """
          Closes the connection with the serial port.
          :return: None.
          """
          self.ser.close()
code_tokens: def close_connection ( self ) : self . ser . close ( )
short_docstring: Closes the connection with the serial port.
short_docstring_tokens: Closes the connection with the serial port .
comment: """
          Closes the connection with the serial port.
          :return: None.
          """