# File lib/zip/zipfilesystem.rb, line 227 def open(fileName, openMode = "r", &block) case openMode when "r" @mappedZip.get_input_stream(fileName, &block) when "w" @mappedZip.get_output_stream(fileName, &block) else raise StandardError, "openmode '#{openMode} not supported" unless openMode == "r" end end