render_partial

# File actionview/lib/action_view/renderer/partial_renderer.rb, line 295
    def render_partial
      view, locals, block = @view, @locals, @block
      object, as = @object, @variable

      if !block && (layout = @options[:layout])
        layout = find_template(layout.to_s, @template_keys)
      end

      object ||= locals[as]
      locals[as] = object

      content = @template.render(view, locals) do |*name|
        view._layout_for(*name, &block)
      end

      content = layout.render(view, locals){ content } if layout
      content
    end