https://github.com/oracle/graal: GraalVM is an ecosystem for compiling and running applications written in multiple languages. GraalVM removes the isolation between programming languages and enables interoperability in a shared runtime. 
public interface org.graalvm.nativeimage.LogHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.graalvm.nativeimage.LogHandler
  super_class: java.lang.Object
{
  public abstract void log(org.graalvm.nativeimage.c.type.CCharPointer, org.graalvm.word.UnsignedWord);
    descriptor: (Lorg/graalvm/nativeimage/c/type/CCharPointer;Lorg/graalvm/word/UnsignedWord;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      bytes   
      length  

  public abstract void flush();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void fatalError();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "LogHandler.java"