(self)
return self._domain
The current domain the optimizer operates on.
        
        :return: :class:'~.domain.Domain` object
The current domain the optimizer operates on.
        
        :return: :class:'~.domain.Domain` object
The current domain the optimizer operates on . : return : : class : ~ . domain . Domain object
def domain(self):
        """
        The current domain the optimizer operates on.
        
        :return: :class:'~.domain.Domain` object 
        """
        return self._domain
def domain ( self ) : return self . _domain