Psych::Visitors::YAMLTree#visit_Psych_Set

# File tmp/rubies/ruby-4.0.0/ext/psych/lib/psych/visitors/yaml_tree.rb, line 375
def visit_Psych_Set o
  register(o, @emitter.start_mapping(nil, '!set', false, Psych::Nodes::Mapping::BLOCK))

  o.each do |k,v|
    accept(@stringify_names && Symbol === k ? k.to_s : k)
    accept v
  end

  @emitter.end_mapping
end