---
$ cat moda.d 
struct Namespace
{
    public import modb;
}

void main ( )
{
    Namespace.foo();
}
$ cat modb.d 
void foo () {}
$ rdmd moda.d 
moda.d(8): Error: no property 'foo' for type 'Namespace', did you mean 'foo'?
Failed: ["dmd", "-v", "-o-", "moda.d", "-I."]
---

Used to work before new symbol lookup system was implemented in 2.071 - and I have explicitly got Walter confirmation that it can be expected to keep working in future (http://forum.dlang.org/post/pmezncogehwjnvjrxwns@forum.dlang.org , http://forum.dlang.org/post/mr33a2$26ut$1@digitalmars.com)