PMD ruleset with custom XPath rule "AvoidProductionDebugLogs"

ruleset.xml

<?xml version="1.0" encoding="UTF-8"?>
<ruleset xmlns="http://pmd.sourceforge.net/ruleset/2.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="Default ruleset used by the CodeClimate Engine for Salesforce.com Apex" xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.sourceforge.io/ruleset_2_0_0.xsd">
    
    <description>Default ruleset for PMD/Codacy</description>


    <!-- CUSTOM RULES -->

    <rule name="AvoidProductionDebugLogs" language="apex" class="net.sourceforge.pmd.lang.apex.rule.ApexXPathRule"
          message="Avoid leaving System.debug() statments in code as they negativly influence performance.">
       
        <description>Avoid leaving System.debug() statments in code as they negativly influence performance.</description>
        <priority>3</priority>

        <properties>
            <property name="xpath">
                <value><![CDATA[
                        //MethodCallExpression[@FullMethodName='System.debug'][count(*)=2]
                ]]></value>
            </property>
        </properties>

        <example><![CDATA[
            // this is OK
            System.debug(LoggingLevel.ERROR, 'Failure');
            // but this is not
            System.debug('Debug' + var);
        ]]></example>
    </rule>
</ruleset>