push

# File ext/psych/lib/psych/visitors/yaml_tree.rb, line 51
      def push object
        start unless started?
        version = []
        version = [1,1] if @options[:header]

        case @options[:version]
        when Array
          version = @options[:version]
        when String
          version = @options[:version].split('.').map { |x| x.to_i }
        else
          version = [1,1]
        end if @options.key? :version

        @emitter.start_document version, [], false
        accept object
        @emitter.end_document
      end