first import

sites/all/modules/panels/plugins/styles/default.inc

@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file
+ * Definition of the 'default' panel style.
+ */
+
+// Plugin definition
+$plugin = array(
+  'title' => t('No style'),
+  'description' => t('The default panel rendering style; displays each pane with a separator.'),
+  'render region' => 'panels_default_style_render_region',
+);
+
+/**
+ * Render callback.
+ *
+ * @ingroup themeable
+ */
+function theme_panels_default_style_render_region($vars) {
+  $output = '';
+//  $output .= '<div class="region region-' . $vars['region_id'] . '">';
+  $output .= implode('<div class="panel-separator"></div>', $vars['panes']);
+//  $output .= '</div>';
+  return $output;
+}
+