UndefVarError in `bidrand(d::GaussianLaguerre, n::Int)`

Comes from `chi` function:
```
function bidrand(d::GaussianLaguerre, m::Integer)
if d.a <= d.beta*(m-1)/2.0
error("Given your choice of m and beta, a must be at least $(d.beta*(m-1)/2.0) (You said a = $(d.a))")
end
Bidiagonal([chi(2*d.a-i*d.beta) for i=0:m-1], [chi(d.beta*i) for i=m-1:-1:1], true)
end
```
Perhaps its from Distributions.jl?