read(io, [sink=StructArray], colspecs::Union{NamedTuple, Dictionary}; skiprows=Int[], skiprows_startwith=String[], missings=String[], strip_chars=[' '], allow_shorter_lines=false, allow_overlap=false, restrict_remaining_chars=nothing)
read(io, [sink=StructArray]; headerrow::Union{Int, AbstractString}, skiprows=Int[], skiprows_startwith=String[], missings=String[], delim=' ')