Error when using unique_args in 4.0.8

[kapso]

Getting this error - ArgumentError: wrong number of arguments (1 for 2) when running this code #138

And the error is reported at this line def self.unique_args(id, blob)

[mhenrixon]

Try changing to:

def self.unique_args(args)
 [args.first]
end

[mark-ellul]

Could the documentation in the Readme be updated to reflect the resolution to this issue?