Hey guys, I'm going to start making a tip of the day (although
I'm pretty sure I won't be able to give every day a tip), but
those things are really interesting to newcomers to know and may
be obvious to some of the old schoolers there.
Always public import a type that the user (including you) is
expected to interact with:
Imagine we have a module A that define a tree
```d
module a;
struct Tree(T){}
```
If you create a module b containing a function that returns a
tree:
```d
module b;
import a;
Tree!string getDirectoryTree(string entry){return null;}
```
This is virtually unusable! One must `public import a: Tree;`
This will make your API a lot easier to interact with, keep in
mind to always public import some type that is used from another
dependency like this, but try to not overdo it.
