[Python] JSON reference in $ref isn't acknowledged

Description

It looks like I am having a couple issues.

1. $ref: '#/definitions/Tenant/properties/name' gets rendered in the Tenant model with type Tenantpropertiesname
2. The rendered Tenant model only has a name property. The Tenant definition below has 6 total properties which do not make it into the rendered model.
3. Replacing $ref: '#/definitions/Tenant/properties/name' with a simple type: string fixes the type issue but still leaves a relatively empty Template model.

@property
    def name(self):
        """
        Gets the name of this Tenant.

        :return: The name of this Tenant.
        :rtype: Tenantpropertiesname
        """
        return self._name

Swagger-codegen version

2.2.3

Swagger declaration file content or url

patch:
      description: Update a tenant record.
      operationId: update
      tags:
      - tenants
      parameters:
      - $ref: "#/parameters/id"
      - in: body
        name: tenant
        description: The tenant properties to update
        schema:
          type: object
          required:
            - name
          properties:
            name:
              $ref: '#/definitions/Tenant/properties/name'

Tenant:
    type: object
    required:
      - name
      - handle
    properties:
      id:
        type: integer
        format: int32
        readOnly: true
      name:
        type: string
      handle:
        type: string
        pattern: '^[a-zA-Z0-9-]{0,62}$'
      createdAt:
        type: string
        format: date-time
        readOnly: true
      updatedAt:
        type: string
        format: date-time
        readOnly: true
      deletedAt:
        type: string
        format: date-time
        readOnly: true

Command line used for generation

swagger-codegen generate --input-spec fetched/tenant-service.yaml --lang python --output sdk

Steps to reproduce

Related issues/PRs

I am not able to find a related issue.

Suggest a fix/enhancement

Unsure.

Start by running the reported swagger-codegen command with the supplied YAML declaration and inspect the generated Python Tenant model. Trace handling of the nested $ref to Tenant/properties/name and compare the result with all six properties in the Tenant definition. Done means the reference has the correct type and the generated model retains the complete Tenant property set.