https://www.graalvm.org/ 
final class com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState extends com.oracle.truffle.nfi.NFIType$TypeCachedState
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState
  super_class: com.oracle.truffle.nfi.NFIType$TypeCachedState
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState this
         0: .line 106
            aload 0 /* this */
            iconst_1
            invokespecial com.oracle.truffle.nfi.NFIType$TypeCachedState.<init>:(I)V
         1: .line 108
            return
        end local 0 // com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/nfi/NFIType$ClosureTypeCachedState;
}
SourceFile: "NFIType.java"
NestHost: com.oracle.truffle.nfi.NFIType
InnerClasses:
  final ClosureTypeCachedState = com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState of com.oracle.truffle.nfi.NFIType
  ConvertFromNative = com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState$ConvertFromNative of com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState
  ConvertToNative = com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState$ConvertToNative of com.oracle.truffle.nfi.NFIType$ClosureTypeCachedState
  abstract TypeCachedState = com.oracle.truffle.nfi.NFIType$TypeCachedState of com.oracle.truffle.nfi.NFIType
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportLibrary(value = Lcom/oracle/truffle/nfi/NFITypeLibrary;)