Psych::Visitors::YAMLTree#visit_Hash

# File tmp/rubies/ruby-4.0.0/ext/psych/lib/psych/visitors/yaml_tree.rb, line 362
def visit_Hash o
  if o.class == ::Hash
    register(o, @emitter.start_mapping(nil, nil, true, Psych::Nodes::Mapping::BLOCK))
    o.each do |k,v|
      accept(@stringify_names && Symbol === k ? k.to_s : k)
      accept v
    end
    @emitter.end_mapping
  else
    visit_hash_subclass o
  end
end