Boo preprocessor directives

In C# one can do the following:

#pragma warning disable 0219
doSomething();
#pragma warning restore 0219

How can i do the same thing in Boo? I have searched quite a bit in google, unity and boo sites but i couldn’t find anything.

There is an example available at http://unity3d.com/support/documentation/Manual/Platform%20Dependent%20Compilation.html