class Graphiti::Util::ValidationResponse

We need to know two things in the response of a persistence call:

* The model we just tried to persist
* Was the persistence successful?

This object wraps those bits of data. The call is considered unsuccessful when it adheres to the ActiveModel#errors interface, and errors is not blank. In other words, it is not successful if there were validation errors.

@attr_reader object the object we are saving