    # File lib/prawn/outline.rb, line 147
        def insert_section_after(title, &block)
          @prev = items[title]
          if @prev
            @parent = @prev.data.parent
            nxt = @prev.data.next
            if block
              block.arity < 1 ? instance_eval(&block) : block[self]
            end
            adjust_relations(nxt)
          else
            raise Prawn::Errors::UnknownOutlineTitle,
              "\n No outline item with title: '#{title}' exists in the outline tree"
          end
        end