How to define an element inside a structure with type 3x3 Matrix{Float64}

General Usage
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6

@PetrKryslUCSD
It is possible from the below reference. However, it works well with vector, but not Array{Float64, 2}. Do you have any idea?

julia> using Parameters, Base;
julia> Base.@kwdef mutable struct R
    Br::Vector{Float64} = [0,0,0]
    #Ls::Array{Float64, 2} = [0,0,0; 0,0,0; 0,0,0] 
end
julia> u = R()
R([0.0, 0.0, 0.0])

julia> Base.@kwdef mutable struct R
           Ls::Array{Float64, 2} = [0,0,0; 0,0,0; 0,0,0]
       end
ERROR: syntax: unexpected semicolon in array expression around util.jl:450
Stacktrace:
 [1] top-level scope
   @ REPL[6]:1