Creating a new distibution with Distributions.jl

New to Julia
,
1

Hello

I am trying to create a new discrete distribution using the package Distributions.jl but I am getting error. I have tried with import instead of using but I always get the same message.

using Distributions
julia> struct shiftwilcoxon <: DiscreteUnivarateDistribution
                n1::Int
                n2::Int
                lambda::Float64
                eta::Float64
       end
ERROR: UndefVarError: `DiscreteUnivarateDistribution` not defined in `Main`
Suggestion: check for spelling errors or missing imports.

What am I missing?
I will define all mandatory methods mentioned in the documentation after, but I understood that the first step was to create my structure from the abstract type.

Thanks for your time.

2

Have you tried struct shiftwilcoxon <: Distributions.DiscreteUnivarateDistribution?