Function: fromJSON() 
fromJSON<
T,E>(json):Result<T,E>
Given a ResultJSON object, convert it into a Result.
Note that this is not designed for parsing data off the wire, but requires you to have already parsed it into the ResultJSON format.
Type Parameters 
T 
T
E 
E
Parameters 
json 
ResultJSON<T, E>
The value to convert from a JSON object.
Returns 
Result<T, E>
The converted Result type.