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.c.struct.RawStructure extends java.lang.annotation.Annotation
  minor version: 0
  major version: 59
  flags: flags: (0x2601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT, ACC_ANNOTATION
  this_class: org.graalvm.nativeimage.c.struct.RawStructure
  super_class: java.lang.Object
{
  public abstract java.lang.Class<? extends java.util.function.IntUnaryOperator> sizeProvider();
    descriptor: ()Ljava/lang/Class;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/lang/Class<+Ljava/util/function/IntUnaryOperator;>;
    AnnotationDefault: Ljava/util/function/IntUnaryOperator;
}
SourceFile: "RawStructure.java"
    RuntimeVisibleAnnotations: 
      java.lang.annotation.Retention(value = java.lang.annotation.RetentionPolicy.RUNTIME:Ljava/lang/annotation/RetentionPolicy;)
      java.lang.annotation.Target(value = {java.lang.annotation.ElementType.TYPE:Ljava/lang/annotation/ElementType;})