Fiber!(SparseList(Dense(Element(zero))) representation:

array: [0.0 0.0 0.0 0.0 0.0; 0.0 0.0 0.0 0.0 0.0; 0.0 0.0 0.0 0.0 0.0; 0.0 0.0 0.0 0.0 0.0; 0.0 0.0 0.0 0.0 0.0]
fiber: Fiber(SparseList{Int32, Int32}(Dense{Int32}(Element{0.0, Float64, Int32, Vector{Float64}}([]), 5), 5, [1, 1], []))
array: [1.0 1.0 1.0 1.0 1.0; 1.0 1.0 1.0 1.0 1.0; 1.0 1.0 1.0 1.0 1.0; 1.0 1.0 1.0 1.0 1.0; 1.0 1.0 1.0 1.0 1.0]
fiber: Fiber(SparseList{Int32, Int32}(Dense{Int32}(Element{0.0, Float64, Int32, Vector{Float64}}([1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0]), 5), 5, [1, 6], [1, 2, 3, 4, 5]))
array: [0.0 1.0 2.0 2.0; 0.0 0.0 0.0 0.0; 1.0 1.0 2.0 0.0; 0.0 0.0 0.0 0.0]
fiber: Fiber(SparseList{Int32, Int32}(Dense{Int32}(Element{0.0, Float64, Int32, Vector{Float64}}([0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0, 2.0, 0.0, 2.0, 0.0, 2.0, 0.0, 0.0, 0.0]), 4), 4, [1, 5], [1, 2, 3, 4]))

