Initialize fields of type object with default constructor

[manosntoulias]

Description

I have a model that is autogenerated by swagger to this:

ModelDto {
 private SomeOtherModelDto object = null;
}

How do I force the object field to be initialized with the default constructor instead, like this:

ModelDto {
 private SomeOtherModelDto object = new SomeOtherModelDto();
}

In swagger the spec looks like this so far:

ModelDto:
  type: object
  properties:
    SomeOtherModelDto:
          type: object
          ....