https://www.graalvm.org/ 
class org.graalvm.component.installer.ComponentInstallerTest$1 extends org.graalvm.component.installer.TestBase$FeedbackAdapter
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.graalvm.component.installer.ComponentInstallerTest$1
  super_class: org.graalvm.component.installer.TestBase$FeedbackAdapter
{
  final org.graalvm.component.installer.ComponentInstallerTest this$0;
    descriptor: Lorg/graalvm/component/installer/ComponentInstallerTest;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(org.graalvm.component.installer.ComponentInstallerTest, org.graalvm.component.installer.TestBase);
    descriptor: (Lorg/graalvm/component/installer/ComponentInstallerTest;Lorg/graalvm/component/installer/TestBase;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.graalvm.component.installer.ComponentInstallerTest$1 this
         0: .line 406
            aload 0 /* this */
            aload 1
            putfield org.graalvm.component.installer.ComponentInstallerTest$1.this$0:Lorg/graalvm/component/installer/ComponentInstallerTest;
            aload 0 /* this */
            aload 2
            invokespecial org.graalvm.component.installer.TestBase$FeedbackAdapter.<init>:(Lorg/graalvm/component/installer/TestBase;)V
            return
        end local 0 // org.graalvm.component.installer.ComponentInstallerTest$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/component/installer/ComponentInstallerTest$1;
    MethodParameters:
        Name  Flags
      this$0  final
      this$1  final

  public void output(java.lang.String, java.lang.Object[]);
    descriptor: (Ljava/lang/String;[Ljava/lang/Object;)V
    flags: (0x0081) ACC_PUBLIC, ACC_VARARGS
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // org.graalvm.component.installer.ComponentInstallerTest$1 this
        start local 1 // java.lang.String bundleKey
        start local 2 // java.lang.Object[] params
         0: .line 409
            aload 0 /* this */
            aload 1 /* bundleKey */
            aload 2 /* params */
            invokespecial org.graalvm.component.installer.TestBase$FeedbackAdapter.output:(Ljava/lang/String;[Ljava/lang/Object;)V
         1: .line 410
            aload 0 /* this */
            getfield org.graalvm.component.installer.ComponentInstallerTest$1.this$0:Lorg/graalvm/component/installer/ComponentInstallerTest;
            getfield org.graalvm.component.installer.ComponentInstallerTest.helpLines:Ljava/util/List;
            aload 0 /* this */
            aload 1 /* bundleKey */
            aload 2 /* params */
            invokevirtual org.graalvm.component.installer.ComponentInstallerTest$1.reallyl10n:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
            ldc "\n"
            invokevirtual java.lang.String.split:(Ljava/lang/String;)[Ljava/lang/String;
            invokestatic java.util.Arrays.asList:([Ljava/lang/Object;)Ljava/util/List;
            invokeinterface java.util.List.addAll:(Ljava/util/Collection;)Z
            pop
         2: .line 411
            return
        end local 2 // java.lang.Object[] params
        end local 1 // java.lang.String bundleKey
        end local 0 // org.graalvm.component.installer.ComponentInstallerTest$1 this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    3     0       this  Lorg/graalvm/component/installer/ComponentInstallerTest$1;
            0    3     1  bundleKey  Ljava/lang/String;
            0    3     2     params  [Ljava/lang/Object;
    MethodParameters:
           Name  Flags
      bundleKey  
      params     

  public void message(java.lang.String, java.lang.Object[]);
    descriptor: (Ljava/lang/String;[Ljava/lang/Object;)V
    flags: (0x0081) ACC_PUBLIC, ACC_VARARGS
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.graalvm.component.installer.ComponentInstallerTest$1 this
        start local 1 // java.lang.String bundleKey
        start local 2 // java.lang.Object[] params
         0: .line 415
            aload 0 /* this */
            aload 1 /* bundleKey */
            aload 2 /* params */
            invokevirtual org.graalvm.component.installer.ComponentInstallerTest$1.output:(Ljava/lang/String;[Ljava/lang/Object;)V
         1: .line 416
            return
        end local 2 // java.lang.Object[] params
        end local 1 // java.lang.String bundleKey
        end local 0 // org.graalvm.component.installer.ComponentInstallerTest$1 this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lorg/graalvm/component/installer/ComponentInstallerTest$1;
            0    2     1  bundleKey  Ljava/lang/String;
            0    2     2     params  [Ljava/lang/Object;
    MethodParameters:
           Name  Flags
      bundleKey  
      params     
}
SourceFile: "ComponentInstallerTest.java"
EnclosingMethod: org.graalvm.component.installer.ComponentInstallerTest.testCommandHelpConsistent:()V
NestHost: org.graalvm.component.installer.ComponentInstallerTest
InnerClasses:
  org.graalvm.component.installer.ComponentInstallerTest$1
  public FeedbackAdapter = org.graalvm.component.installer.TestBase$FeedbackAdapter of org.graalvm.component.installer.TestBase