https://www.graalvm.org/ 
interface com.oracle.svm.core.genscavenge.HeapChunk$HeaderPadding extends org.graalvm.word.PointerBase
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.svm.core.genscavenge.HeapChunk$HeaderPadding
  super_class: java.lang.Object
{
}
SourceFile: "HeapChunk.java"
NestHost: com.oracle.svm.core.genscavenge.HeapChunk
InnerClasses:
  private abstract HeaderPadding = com.oracle.svm.core.genscavenge.HeapChunk$HeaderPadding of com.oracle.svm.core.genscavenge.HeapChunk
    RuntimeVisibleAnnotations: 
      org.graalvm.nativeimage.c.struct.RawStructure(sizeProvider = Lcom/oracle/svm/core/genscavenge/HeapChunk$HeaderPaddingSizeProvider;)