[JAVA/okhttp-gson] Bug generating noncompilable code when discriminator is used

Description

Generating swagger API for okhttp-gson with usage of discriminator in model definitions for inheritance and polymorphism will output non compilable code in the parent classes.

Swagger-codegen version

swaggerCodegen 'io.swagger:swagger-codegen-cli:2.4.12'

Swagger declaration file content or url

...
  SomeStatus:
    type: object
    discriminator: classType
    properties:
      statusText:
        description: The status as text
        type: string
      statusDetail:
        description: Additional information to given status.
        type: string
...

Possible fix

Changing the pojo.mustache solved the problem in my case. But I am not sure about side effects:

...
  {{#gson}}
  {{#discriminator}}
  @SerializedName("{{discriminator}}")
  protected String {{discriminator}};
  {{/discriminator}}
  {{/gson}}

  {{#parcelableModel}}
  public {{classname}}() {
  {{#parent}}
    super();
  {{/parent}}
  {{#gson}}
  {{#discriminator}}
    this.{{discriminator}} = this.getClass().getSimpleName();
  {{/discriminator}}
  {{/gson}}
  }
  {{/parcelableModel}}
  {{^parcelableModel}}
  {{#gson}}
  {{#discriminator}}
  public {{classname}}() {
    this.{{discriminator}} = this.getClass().getSimpleName();
  }
  {{/discriminator}}
  {{/gson}}
  {{/parcelableModel}}
...

Start with the affected pojo.mustache template and inspect how discriminator fields and constructors are rendered for okhttp-gson parent classes. Compare the generated output with the declaration using SomeStatus and verify that the resulting parent classes compile without introducing side effects.