Improve output for top level $ref

A $ref breaks when used on the root object

Example A

Non-working example:

{
 "$schema": "http://json-schema.org/draft-04/schema#",
 "type": "object",
 "$ref": "#/definitions/anatomic-location",
  "definitions": {
    "anatomic-location": {
      "description": "thing",
      "properties": {
        /* .. */
        "children": {
          "type": "array",
          "items": { "$ref": "#/definitions/anatomic-location" }
        },
      }
    }
  }
}

Error message will be:

Refs should have been resolved by the resolver!

It will log:

  title: 'AnatomicLocation',
  properties: 
   { id: { type: 'integer' } },
  '$ref': '#' }

I wonder where the $ref: '#' comes from?

Example B

Working but with duplicated interface

  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "$ref": "#/definitions/anatomic-location/properties"
  },
  "definitions": {
    "anatomic-location": {
      "description": "thing...",
       "properties": { /* .. */ }
     }
  }
}

Generated code is:

export interface AnatomicLocation {
  id?: number;
  children?: AnatomicLocation1[];
}

export interface AnatomicLocation1 {
  id: number;
  children?: AnatomicLocation1[];
}