Add missing LinearTransform

Author: devmotion

src/basekernels/piecewisepolynomial.jl

@@ -37,7 +37,7 @@ function PiecewisePolynomialKernel(; v::Int=0, maha=nothing, d::Int=-1)
     if maha !== nothing
         Base.depwarn("keyword argument `maha` is deprecated", :PiecewisePolynomialKernel)
         d = size(maha, 1)
-        return transform(PiecewisePolynomialKernel{v}(d), cholesky(maha).U)
+        return transform(PiecewisePolynomialKernel{v}(d), LinearTransform(cholesky(maha).U))
     else
         return PiecewisePolynomialKernel{v}(d)
     end

src/deprecated.jl

@@ -1,5 +1,5 @@
 # TODO: remove tests when removed
-@deprecate MahalanobisKernel(; P::AbstractMatrix{<:Real}) transform(SqExponentialKernel(), cholesky(P).U)
+@deprecate MahalanobisKernel(; P::AbstractMatrix{<:Real}) transform(SqExponentialKernel(), LinearTransform(cholesky(P).U))
 
 # TODO: remove keyword argument `maha` when removed
-@deprecate PiecewisePolynomialKernel{V}(A::AbstractMatrix{<:Real}) where V transform(PiecewisePolynomialKernel{V}(size(A, 1)), cholesky(A).U)
+@deprecate PiecewisePolynomialKernel{V}(A::AbstractMatrix{<:Real}) where V transform(PiecewisePolynomialKernel{V}(size(A, 1)), LinearTransform(cholesky(A).U))