capture (ActionView::Helpers::CaptureHelper)

    # File lib/action_view/helpers/capture_helper.rb, line 33
          def capture(*args, &block)
            # Return captured buffer in erb.
            if block_called_from_erb?(block)
              with_output_buffer { block.call(*args) }
            else
              # Return block result otherwise, but protect buffer also.
              with_output_buffer { return block.call(*args) }
            end
          end