Ability to move existing block into the tab using its name

Author: vovayatsyuk

Block/Tab/LayoutXmlReference.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Swissup\Easytabs\Block\Tab;
+
+use Magento\Framework\View\Element\BlockInterface;
+use Magento\Framework\View\Element\Text\ListText;
+
+class LayoutXmlReference extends ListText implements BlockInterface
+{
+    public function setTemplate($childNames)
+    {
+        $names = explode(',', $childNames);
+
+        foreach ($names as $i => $name) {
+            if ($child = $this->getLayout()->getBlock($name)) {
+                $this->setChild('easytab.xml.' . $i, $child);
+            }
+        }
+
+        return $this;
+    }
+}

etc/easytabs.xml

@@ -176,6 +176,16 @@
             </parameter>
         </parameters>
     </widget>
+    <widget id="easytabs_xml_reference" class="Swissup\Easytabs\Block\Tab\LayoutXmlReference" is_email_compatible="false"
+        placeholder_image="" ttl="86400">
+        <label translate="true">Reference to the Layout XML Block</label>
+        <description>Move existing layout XML block to the tab</description>
+        <parameters>
+            <parameter name="widget_template" xsi:type="text" required="true" visible="true">
+                <label translate="true">Block name in Layout XML</label>
+            </parameter>
+        </parameters>
+    </widget>
     <widget id="easytabs_cms" class="Swissup\Easytabs\Block\Tab\Cms" is_email_compatible="false"
         placeholder_image="" ttl="86400">
         <label translate="true">CMS Static Block</label>