code: func (o *PetDeleteParams) BindRequest(r *http.Request, route *middleware.MatchedRoute) error {
  	var res []error
  
  	o.HTTPRequest = r
  
  	if err := o.bindAPIKey(r.Header[http.CanonicalHeaderKey("api_key")], true, route.Formats); err != nil {
  		res = append(res, err)
  	}
  
  	rPetID, rhkPetID, _ := route.Params.GetOK("petId")
  	if err := o.bindPetID(rPetID, rhkPetID, route.Formats); err != nil {
  		res = append(res, err)
  	}
  
  	if len(res) > 0 {
  		return errors.CompositeValidationError(res...)
  	}
  	return nil
  }
docs: // BindRequest both binds and validates a request, it assumes that complex things implement a Validatable(strfmt.Registry) error interface
  // for simple values it will use straight method calls.
  //
  // To ensure default values, the struct must have been initialized with NewPetDeleteParams() beforehand.