spec.go
func (d *Document) Expanded(options ...*spec.ExpandOptions) (*Document, error) {
	swspec := new(spec.Swagger)
	if err := json.Unmarshal(d.raw, swspec); err != nil {
		return nil, err
	}

	var expandOptions *spec.ExpandOptions
	if len(options) > 0 {
		expandOptions = options[0]
	} else {
		expandOptions = &spec.ExpandOptions{
			RelativeBase: d.specFilePath,
		}
	}

	if err := spec.ExpandSpec(swspec, expandOptions); err != nil {
		return nil, err
	}

	dd := &Document{
		Analyzer:     analysis.New(swspec),
		spec:         swspec,
		specFilePath: d.specFilePath,
		schema:       spec.MustLoadSwagger20Schema(),
		raw:          d.raw,
		origSpec:     d.origSpec,
	}
	return dd, nil
}
func (d *Document) Expanded(options ...*spec.ExpandOptions) (*Document, error) {
	swspec := new(spec.Swagger)
	if err := json.Unmarshal(d.raw, swspec); err != nil {
		return nil, err
	}

	var expandOptions *spec.ExpandOptions
	if len(options) > 0 {
		expandOptions = options[0]
	} else {
		expandOptions = &spec.ExpandOptions{
			RelativeBase: d.specFilePath,
		}
	}

	if err := spec.ExpandSpec(swspec, expandOptions); err != nil {
		return nil, err
	}

	dd := &Document{
		Analyzer:     analysis.New(swspec),
		spec:         swspec,
		specFilePath: d.specFilePath,
		schema:       spec.MustLoadSwagger20Schema(),
		raw:          d.raw,
		origSpec:     d.origSpec,
	}
	return dd, nil
}
// Expanded expands the ref fields in the spec document and returns a new spec document