addall(::AbstractDict, ::AbstractDict)

Internals & Design
2

I think merge! already does this:

help?> merge!
search: merge! mergewith! merge mergewith MergeSort

  merge!(d::AbstractDict, others::AbstractDict...)

  Update collection with pairs from the other collections. See also merge.

  Examples
  ≡≡≡≡≡≡≡≡≡≡

  julia> d1 = Dict(1 => 2, 3 => 4);

  julia> d2 = Dict(1 => 4, 4 => 5);

  julia> merge!(d1, d2);

  julia> d1
  Dict{Int64, Int64} with 3 entries:
    4 => 5
    3 => 4
    1 => 4
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