[drools-user] Drools 3, return value expression binding possible?

[Juergen]

Is there some way to bind the result of a return value expression on LHS?
e.g.:

rule "a"
        when
                exprBind : (expensiveExpression())
                A ( someAttrib == (exprBind.someValue()))
                B ( someOtherAttrib > (exprBind.someOtherValue()))
        then
                ...
end

Its not a global variable, just some expensive expression used more than 
once on LHS and probably RHS too.