class Puma::DSL

end
[200, {}, ["error page"]]
lowlevel_error_handler do |err|
@example

configuration file to change the default error on the server.
Use +obj+ or +block+ as the low level error handler. This allows the

def lowlevel_error_handler(obj=nil, &block)
  obj ||= block
  raise "Provide either a #call'able or a block" unless obj
  @options[:lowlevel_error_handler] = obj
end