apm-checkstyle/importControl.xml

<?xml version="1.0"?>
<!--
  ~ Licensed to the Apache Software Foundation (ASF) under one or more
  ~ contributor license agreements.  See the NOTICE file distributed with
  ~ this work for additional information regarding copyright ownership.
  ~ The ASF licenses this file to You under the Apache License, Version 2.0
  ~ (the "License"); you may not use this file except in compliance with
  ~ the License.  You may obtain a copy of the License at
  ~
  ~     http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  ~
  -->

<!DOCTYPE import-control PUBLIC
        "-//Puppy Crawl//DTD Import Control 1.4//EN"
        "https://checkstyle.org/dtds/import_control_1_4.dtd">

<import-control pkg="org.apache.skywalking.apm.(toolkit|plugin)" regex="true">
    <allow pkg="java"/>
    <allow pkg="org.apache.skywalking"/>
    <allow pkg="net.bytebuddy"/>
</import-control>