How to provide sources with just a schema and mock the response?

[nemonemi]

I am starting a project and I still don't have an api serving the schema, so, I would like to create a schema, give it to the mesh and mock the response.
I believe I've seen this somewhere at some point in time, but I cannot find it now.

How can this be achieved?

e.g.

.meshrc.yaml

sources:
  - name: Wiki
    handler:
      graphql:
        endpoint: ./schema.graphql

transforms:
  - mock:
      if: true
      mocks:
        - apply: Certificate.id
          faker: '{{datatype.uuid}}'
        - apply: Certificate.name
          faker: '{{name.firstName}}'
        - apply: Query.certificates
          length: 5

serve:
  port: 5000

schema.graphql

type Query {
  certificates: [Certificate!]!
}

type Certificate {
  id: ID!
  name: String!
}

Currently, when I run this I get the following error:

Generating Mesh schema...error: Unable to serve mesh:  HandlerCtor is not a constructor {"stack":"TypeError: HandlerCtor is not a
constructor\n

[nemonemi]

It turns out, exactly like that. There was a bugfix that made this functioning correctly.
https://github.com/Urigo/graphql-mesh/pull/2175/files