Optional Arguments in SchemaTypes.path().cast required by Typescript

[iamjackchen]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Mongoose version

7.6.7

Node.js version

18.20.3

MongoDB server version

7.0.12

Typescript version (if applicable)

5.2.2

Description

It looks like the typescript signature for SchemaTypes.path().cast require some (what appear to be) optional fields.

I wanted to create a subdocument instance without creating a model. With reference to #9076,

I had

which works exactly as intended with the //@ts-ignore, but otherwise gives me a type error. Upon further examination,
it appears that

doc and init are required fields in the typescript signature, whereas they seem to be optional in a lot of the documentation I've seen.

This is my top-level schema file:

Please let me know if I'm mistaken somewhere, many thanks!!

Steps to Reproduce

Please see above.

Expected Behavior

Optional (?) fields should be required by typescript signature

[Imanghvs]

They are required fields according to the the docs here: https://mongoosejs.com/docs/api/schematype.html#SchemaType.prototype.cast()
I'm not sure how it works without typescript. Maybe the code handles undefined values somehow.