<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/Module.xsd">
    <module name="Rmsundar_Bundle" setup_version="1.0.0">
        <sequence>
            <module name="Magento_Bundle"/>
        </sequence>
    </module>
</config>

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="MagentoBundleBlockAdminhtmlCatalogProductEditTabBundleOption">
        <arguments>
            <argument name="template" xsi:type="string">Rmsundar_Bundle::product/edit/bundle/option.phtml</argument>
        </arguments>
    </type>
</config>

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="MagentoBundleBlockAdminhtmlCatalogProductEditTabBundleOption">
        <arguments>
            <argument name="data"  xsi:type="array">
                <item name="template" xsi:type="string">Rmsundar_Bundle::product/edit/bundle/option.phtml</item>
            </argument>
        </arguments>
    </type>
</config>

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="MagentoBundleBlockAdminhtmlCatalogProductEditTabBundleOption" type="RmsundarBundleBlockAdminhtmlCatalogProductEditTabBundleOption" />
</config>

<?php

namespace RmsundarBundleBlockAdminhtmlCatalogProductEditTabBundle;

class Option extends MagentoBundleBlockAdminhtmlCatalogProductEditTabBundleOption
{
    protected $_template = 'Rmsundar_Bundle::product/edit/bundle/option.phtml';
}