Error writing problem to another format about qubotools.jl HOT 2 CLOSED

julia> model = QUBOTools.read_model("problem.json")
QUBO Model [Min, 𝔹]
▷ Variables ……… 3

Density:
▷ Linear ……………… 66.67%
▷ Quadratic ……… 66.67%
▷ Total ………………… 66.67%

There are no solutions available.


julia> write("problem.qubo", model)
ERROR: MethodError: no method matching write(::IOStream, ::QUBOTools.Model{Int64, Float64, Int64})

Closest candidates are:
  write(::Union{AbstractString, IO}, ::QUBOTools.AbstractModel, ::QUBOTools.AbstractFormat)
   @ QUBOTools C:\Users\pedroxavier\.julia\packages\QUBOTools\gdvpc\src\model\abstract.jl:370
  write(::IO, ::Any)
   @ Base io.jl:674
  write(::IO, ::Any, ::Any...)
   @ Base io.jl:675
  ...

Stacktrace:
 [1] write(io::IOStream, x::QUBOTools.Model{Int64, Float64, Int64})
   @ Base .\io.jl:674
 [2] (::Base.var"#414#415"{QUBOTools.Model{Int64, Float64, Int64}, Tuple{}})(io::IOStream)
   @ Base .\io.jl:459
 [3] open(::Base.var"#414#415"{QUBOTools.Model{Int64, Float64, Int64}, Tuple{}}, ::String, ::Vararg{String}; kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
   @ Base .\io.jl:395
 [4] open(::Function, ::String, ::String)
   @ Base .\io.jl:392
 [5] write(::String, ::QUBOTools.Model{Int64, Float64, Int64})
   @ Base .\io.jl:459
 [6] top-level scope
   @ REPL[16]:1

julia> QUBOTools.write_model("problem.qubo", model)

julia> print(stdout, read("problem.qubo", String))
2 2 0.4
3 3 -4.4
1 2 -0.8
1 3 6.0