# File lib/aruba/api.rb, line 50
    def _create_fixed_size_file(file_name, file_size, check_presence)
      in_current_dir do
        raise "expected #{file_name} to be present" if check_presence && !File.file?(file_name)
        _mkdir(File.dirname(file_name))
        File.open(file_name, "wb"){ |f| f.seek(file_size - 1); f.write("\0") }
      end
    end