https://openjdk.java.net/ 
public interface sun.jvm.hotspot.debugger.PageFetcher
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.jvm.hotspot.debugger.PageFetcher
  super_class: java.lang.Object
{
  public abstract sun.jvm.hotspot.debugger.Page fetchPage(long, long);
    descriptor: (JJ)Lsun/jvm/hotspot/debugger/Page;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
                 Name  Flags
      pageBaseAddress  
      numBytes         
}
SourceFile: "PageFetcher.java"