argTypeMap no longer takes custom types

[ddcollins]

Describe the bug
In the old version of Mesh, we were defining a custom type via the base schema like so:

argTypeMap:
  id: ID!
  contentType: "ReciprocityContentType!"

However this isn't possible in the new version of Mesh. Nor does it seem that argTypeMap likes references to files:

argTypeMap:
  id: ID!
  contentType: ./src/json-schemas/reciprocity-api/base-schema.json#/definitions/ReciprocityContentType

(Tried in quotes too)

🕸️ - Server: Generating Mesh schema...
🕸️ - Server: TypeError[Query.reciprocityContent.contentType]: Syntax Error: Cannot parse the unexpected character ".".
error Command failed with exit code 1.

ReciprocityContentType is an enum type.

Is there a way I'm not seeing to do this?

Expected behavior
A file path can be provided to specify a custom type.

Environment:

"@graphql-mesh/cli": "^0.38.0",
"@graphql-mesh/graphql": "^0.18.10",
"@graphql-mesh/json-schema": "^0.18.3",
"@graphql-mesh/transform-naming-convention": "^0.6.60",
"@graphql-mesh/transform-resolvers-composition": "^0.10.10",

node:14.15-alpine

[ardatan]

https://the-guild.dev/graphql/mesh/docs/handlers/json-schema#manual-declare
The new API is documented here.
It supports references like;

contentType: 
   $ref: ./src/json-schemas/reciprocity-api/base-schema.json#/definitions/ReciprocityContentType

Feel free to create a new issue if it still persists.