@property<EOL><INDENT>def B(self):<DEDENT>
return self._B<EOL>
Property of AplusBT parameter B.

        :getter:    Returns the parameter B which is stored in attribute
                    ``self._B``
        :setter:    * sets parameter B which is addressed as ``self._B``
                      to the new value
                    * updates the parameter dictionary ``self.param['B']``
        :type:      float