Problem with Doc generation and then code generation

I've just started to look over SwaggerHub and am doing so by pointing it at a Magento server that I maintain. The problem that I am having is that models are not always created within the documentation which then impacts the code generation (I guess).

The following is the doc produced for a call based call on the server

  /V1/carts/{cartId}/update-order:
    post:
      tags:
        - mageplazaSmtpCheckoutManagementV1
      description: ''
      operationId: mageplazaSmtpCheckoutManagementV1UpdateOrderPost
      consumes:
        - application/json
        - application/xml
      produces:
        - application/json
        - application/xml
      parameters:
        - name: cartId
          in: path
          type: string
          required: true
        - name: mageplazaSmtpCheckoutManagementV1UpdateOrderPostBody
          in: body
          schema:
            required:
              - address
              - isOsc
            properties:
              address:
                type: string
              isOsc:
                type: boolean
            type: object
            xml:
              name: request
      responses:
        '200':
          description: 200 Success.
          schema:
            type: boolean
        default:
          description: Unexpected error
          schema:
            $ref: '#/definitions/error-response'

The issue is with the named parameter "mageplazaSmtpCheckoutManagementV1UpdateOrderPostBody". This does not result in a model being generated within the docs, but the Java client generator does expect a model to be defined in this situation as the function mapped to this API includes

import io.swagger.client.model.MageplazaSmtpCheckoutManagementV1UpdateOrderPostBody;

So ether the code generator is meant to be coding this model inline or the doc is meant to be creating the doc for the model so that the code generator can create a matching function.

Anyone got any ideas?