virtual TContainer create(const extraction_context& context, const value& from) const override
{
using std::end;
TContainer out;
from.as_array(); // get nice error if input is not an array
for (value::size_type idx = 0U; idx < from.size(); ++idx)
out.insert(end(out), context.extract_sub<element_type>(from, idx));
return out;
}