Add `splice!` for StructArrays?

At a first glance, this seems to work. But maybe there are other corner cases or more performant versions...

using StructArrays

function Base.splice!(s::StructVector{T}, index::Integer, vals=T[]) where T
    valsT = StructVector(vals)
    t = map((v, val) -> splice!(v, index, val), StructArrays.components(s), StructArrays.components(valsT))
    return StructArrays.createinstance(T, t...)
end
function Base.splice!(s::StructVector{T}, indexes, vals=T[]) where T
    valsT = StructVector(vals)
    t = map((v, val) -> splice!(v, indexes, val), StructArrays.components(s), StructArrays.components(valsT))
    return StructVector{T}(t)
end

a = [(1,'a'),(2,'b'),(3,'c')] |> StructVector
new = (0,'x')
splice!(a, 1, [new]) == (1, 'a')
splice!(a, 1:0, [new,new]) |> isempty
splice!(a, 4:5) == [(2,'b'),(3,'c')]
a == [(0,'x'),(0,'x'),(0,'x')]

The issue names no files or tests; start by reviewing StructVector, StructArrays.components, StructArrays.createinstance, and Base.splice! behavior for scalar and range indexes. Done means the shown examples pass and relevant corner cases are covered without changing expected splice! return values.