1:
+-- <bootstrap>
      |     
      +-- jdk.internal.reflect.DelegatingClassLoader (+ 41 more)
      |           
      +-- "platform", jdk.internal.loader.ClassLoaders$PlatformClassLoader
            |     
            +-- org.apache.flink.core.plugin.PluginLoader$PluginClassLoader
            |     |     
            |     +-- jdk.internal.reflect.DelegatingClassLoader (+ 16 more)
            |                 
            +-- "app", jdk.internal.loader.ClassLoaders$AppClassLoader
                  |     
                  +-- jdk.internal.reflect.DelegatingClassLoader (+ 86 more)
                  |           
                  +-- sun.reflect.misc.MethodUtil
                  |     |     
                  |     +-- jdk.internal.reflect.DelegatingClassLoader
                  |                 
                  +-- org.apache.flink.util.ChildFirstClassLoader
                        |     
                        +-- jdk.internal.reflect.DelegatingClassLoader