https://www.graalvm.org/ 
class com.oracle.truffle.dsl.processor.library.LibraryGenerator$MessageObjects
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.dsl.processor.library.LibraryGenerator$MessageObjects
  super_class: java.lang.Object
{
  final com.oracle.truffle.dsl.processor.library.LibraryMessage model;
    descriptor: Lcom/oracle/truffle/dsl/processor/library/LibraryMessage;
    flags: (0x0010) ACC_FINAL

  final int messageIndex;
    descriptor: I
    flags: (0x0010) ACC_FINAL

  int cacheIndex;
    descriptor: I
    flags: (0x0000) 

  com.oracle.truffle.dsl.processor.java.model.CodeVariableElement messageField;
    descriptor: Lcom/oracle/truffle/dsl/processor/java/model/CodeVariableElement;
    flags: (0x0000) 

  final com.oracle.truffle.dsl.processor.library.LibraryGenerator this$0;
    descriptor: Lcom/oracle/truffle/dsl/processor/library/LibraryGenerator;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.dsl.processor.library.LibraryGenerator, com.oracle.truffle.dsl.processor.library.LibraryMessage, int);
    descriptor: (Lcom/oracle/truffle/dsl/processor/library/LibraryGenerator;Lcom/oracle/truffle/dsl/processor/library/LibraryMessage;I)V
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // com.oracle.truffle.dsl.processor.library.LibraryGenerator$MessageObjects this
        start local 2 // com.oracle.truffle.dsl.processor.library.LibraryMessage message
        start local 3 // int messageIndex
         0: .line 100
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.dsl.processor.library.LibraryGenerator$MessageObjects.this$0:Lcom/oracle/truffle/dsl/processor/library/LibraryGenerator;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 101
            aload 0 /* this */
            aload 2 /* message */
            putfield com.oracle.truffle.dsl.processor.library.LibraryGenerator$MessageObjects.model:Lcom/oracle/truffle/dsl/processor/library/LibraryMessage;
         2: .line 102
            aload 0 /* this */
            iload 3 /* messageIndex */
            putfield com.oracle.truffle.dsl.processor.library.LibraryGenerator$MessageObjects.messageIndex:I
         3: .line 103
            return
        end local 3 // int messageIndex
        end local 2 // com.oracle.truffle.dsl.processor.library.LibraryMessage message
        end local 0 // com.oracle.truffle.dsl.processor.library.LibraryGenerator$MessageObjects this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    4     0          this  Lcom/oracle/truffle/dsl/processor/library/LibraryGenerator$MessageObjects;
            0    4     2       message  Lcom/oracle/truffle/dsl/processor/library/LibraryMessage;
            0    4     3  messageIndex  I
    MethodParameters:
              Name  Flags
      this$0        final
      message       
      messageIndex  
}
SourceFile: "LibraryGenerator.java"
NestHost: com.oracle.truffle.dsl.processor.library.LibraryGenerator
InnerClasses:
  MessageObjects = com.oracle.truffle.dsl.processor.library.LibraryGenerator$MessageObjects of com.oracle.truffle.dsl.processor.library.LibraryGenerator