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.impl.SizeOfSupport
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.graalvm.nativeimage.impl.SizeOfSupport
  super_class: java.lang.Object
{
  public abstract int sizeof(java.lang.Class<? extends org.graalvm.word.PointerBase>);
    descriptor: (Ljava/lang/Class;)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljava/lang/Class<+Lorg/graalvm/word/PointerBase;>;)I
    MethodParameters:
       Name  Flags
      clazz  
}
SourceFile: "SizeOfSupport.java"
    RuntimeVisibleAnnotations: 
      org.graalvm.nativeimage.Platforms(value = {Lorg/graalvm/nativeimage/Platform$HOSTED_ONLY;})