I have new question:

how I can transfer Vector{UTF8String}(10) to Julia from C?

I think I need use 

jl_value_t* array_type    = jl_apply_array_type( jl_uint8_type, 1 );
jl_array_t* x                   = jl_alloc_array_1d(array_type , 10);
JL_GC_PUSH1(&x);

but this give me only Vector{UInt8}(10)...

I think I need something like Vector{Vector{UInt8}}(10), but how to alocate 
it, when I don't know length of every string?

Thanks for your help :)

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