SilentUI is a UI choice that is absolutely silent.
SilentUI
The SilentUI has no arguments as it does not use any stream.
Source: show | on GitHub
# File ruby/lib/rubygems/user_interaction.rb, line 614 def initialize io = NullIO.new super io, io, io, false end
# File ruby/lib/rubygems/user_interaction.rb, line 619 def close end