Optionalabsolute
If true will generate an absolute url, e.g.
http://www.example.com/fullurl.
Optionalinherit
If true will inherit parameters from the current
parameter values.
Optionallossy
If true, and if there is no url associated with the state provided in the first parameter, then the constructed href url will be built from the first ancestor which has a url.
Optionalrelative
Defines what state to be "relative from"
When a relative path is found (e.g ^ or
.bar), defines which state to be relative from.
An options object for [[StateService.href]]