placeholder to reserve space for a Zip64 extra information record, for the local file header only, that we won't know if we'll need until after we write the file data
# File lib/zip/extra_field/zip64_placeholder.rb, line 9 def initialize(binstr = nil) end
# File lib/zip/extra_field/zip64_placeholder.rb, line 12 def pack_for_local "\x00" * 16 end