wondering if json obj could convert to NamedTuple ?

[mlyz]

wondering why the following doesn't work. Any advice would be greatly appreciated.

julia> testj =
       """{
       "x": 1,
       "y": "a"
       }""";

julia> testl = LazyJSON.value(testj);

julia> convert(NamedTuple{(:x, :y), Tuple{Int, String}}, testl)
ERROR: MethodError: no method matching NamedTuple{(:x, :y),Tuple{Int64,String}}(::LazyJSON.Number{String}, ::LazyJSON.String{String})
Closest candidates are:
  NamedTuple{(:x, :y),Tuple{Int64,String}}(::Any) where {names, T<:Tuple} at namedtuple.jl:92
Stacktrace:
 [1] macro expansion at /home/yx/.julia/packages/LazyJSON/EmafJ/src/AbstractDict.jl:82 [inlined]
 [2] convert(::Type{NamedTuple{(:x, :y),Tuple{Int64,String}}}, ::LazyJSON.Object{Nothing,String}) at /home/yx/.julia/packages/LazyJSON/EmafJ/src/AbstractDict.jl:82
 [3] top-level scope at none:0