Question ScriptedImporter behavior

Hi,

I've created a ScriptedImporter for my custom format (which contains multiple subassets) and I'm using Unity 2019.3.9. Besides many bugs with refreshing the editor after importing, I cannot see any GUID on my meta files nor any of my generated subassets data (besides the GUID for the custom file itself, but again not for any of my generated assets), which suggests to me that the file will just be reimported after the Library folder is gone (like in CI/CD) as well as my current GUID will be lost.

The contents of my file are the usual "unknown filetype" ones, like:

Code (CSharp):

1. fileFormatVersion: 2
2. guid: fcbb2eb54dbf548d6ae87c0919d00b2b
3. DefaultImporter:
4.   externalObjects: {}
5.   userData:
6.   assetBundleName:
7.   assetBundleVariant:
8.  

Am I missing something, is this a bug or is the content of my import stored somewhere else?

 

So it looks like if I now delete the existing meta, I get a new one with "ScriptedImporter" instead of the "DefaultImporter". However, there are no fields on the meta file, UNLESS I add fields to the importer itself, which doesn't make much sense to me. Maybe somebody can explain to me why does the meta file contain the metadata of the importer, instead of the stuff I'm adding to the context using `AddObjectToAsset`?

Thanks.