[typescript-angular] multiple `allOf` with `allOf` does not work

Given the following schema:

swagger: '2.0'
paths:
  "/api/v1/users":
    get:
      summary: Get users
      operationId: GetUserRoute
      responses:
        '200':
          description: Ok
          schema:
            type: array
            items:
              "$ref": "#/definitions/user"
definitions:
  user:
    type: object
    allOf:
    - "$ref": "#/definitions/requiredUser"
    - "$ref": "#/definitions/optionalUser"
  requiredUser:
    type: object
    allOf:
    - "$ref": "#/definitions/email"
    required:
    - id
    properties:
      id:
        type: string
  email:
    type: string
  optionalUser:
    type: object
    allOf:
    - "$ref": "#/definitions/address"
    properties:
      name:
        type: string
  address:
    type: object
    properties:
      zipCode:
        type: string
      street:
        type: string

It describes a user that is allOf: requiredUser, optionalUser.
And they are again composed of properties and allOf.

Then the generated user.ts looks like this:

import { OptionalUser } from './optionalUser';
import { RequiredUser } from './requiredUser';

export interface User extends RequiredUser { 
    name?: string;
}

So all of requiredUser is included, and only the immediate properties of optionalUser but not the address from the allOf.

My expectation would be:

import { OptionalUser } from './optionalUser';
import { RequiredUser } from './requiredUser';

export interface User extends RequiredUser, OptionalUser { 
}

Start at the typescript-angular generator entry point and trace how nested allOf definitions are converted into the generated user.ts interface. Reproduce the issue with the schema in the report, then compare the output with the expected multiple-inheritance form. Done means nested allOf references such as address are preserved in the generated interface without breaking existing composition.