module Gem::SafeMarshal

def self.load(input, permitted_classes: [::Symbol], permitted_symbols: [], permitted_ivars: {})
  root = Reader.new(StringIO.new(input, "r").binmode).read!
  Visitors::ToRuby.new(
    permitted_classes: permitted_classes,
    permitted_symbols: permitted_symbols,
    permitted_ivars: permitted_ivars,
  ).visit(root)
end