···57575858For now, we're assuming you write everything in typelex. You can grab common Lexicons from the [Playground](https://playground.typelex.org/). However, if you just want a ref, you could stub out any external Lexicon, like this:
59596060-```
6161-/** Some docstring */
6060+```typescript
6261namespace com.example.defs {
6362 subject: com.atproto.repo.strongRef.Main; // OK to use here
6463}
65646666-// This is a stub
6565+// This is a stub!
6766namespace com.atproto.repo.strongRef {
6868- model Main { }
6767+ model Main { } // It's fine to leave this empty
6968}
7069```
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