https://www.graalvm.org/ 
final class com.oracle.svm.core.jdk8.Util_sun_text_normalizer_UBiDiProps_JDK8
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.svm.core.jdk8.Util_sun_text_normalizer_UBiDiProps_JDK8
  super_class: java.lang.Object
{
  static final sun.text.normalizer.UBiDiProps singleton;
    descriptor: Lsun/text/normalizer/UBiDiProps;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.svm.core.jdk8.Util_sun_text_normalizer_UBiDiProps_JDK8 this
         0: .line 39
            new java.lang.Error
            dup
            ldc "Unresolved compilation problems: \n\tThe type sun.text.normalizer.UCharacterProperty is not visible\n\tUCharacterProperty cannot be resolved to a type\n\tUCharacterProperty cannot be resolved to a type\n\tUCharacterProperty cannot be resolved to a type\n\tUCharacterProperty cannot be resolved\n\tThe method getSingleton() is undefined for the type UBiDiProps\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // com.oracle.svm.core.jdk8.Util_sun_text_normalizer_UBiDiProps_JDK8 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/core/jdk8/Util_sun_text_normalizer_UBiDiProps_JDK8;
}
SourceFile: "LocaleSubstitutionsJDK8.java"