I've been looking at tools like `ast-grep` and `gritql`, which can search for AST-based patterns, but they both seem limited to matching a single AST node at a time, not multi-line.
Ideally, I'd like:
```
var a = 1;
let b = fn(c)
```
to match:
```
let a = 2;
var b = fn(
c
)
```
