https://openjdk.java.net/ 
public interface org.graalvm.compiler.lir.debug.IntervalDumper
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.graalvm.compiler.lir.debug.IntervalDumper
  super_class: java.lang.Object
{
  public abstract void visitIntervals(org.graalvm.compiler.lir.debug.IntervalDumper$IntervalVisitor);
    descriptor: (Lorg/graalvm/compiler/lir/debug/IntervalDumper$IntervalVisitor;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
         Name  Flags
      visitor  
}
SourceFile: "IntervalDumper.java"
NestMembers:
  org.graalvm.compiler.lir.debug.IntervalDumper$IntervalVisitor
InnerClasses:
  public abstract IntervalVisitor = org.graalvm.compiler.lir.debug.IntervalDumper$IntervalVisitor of org.graalvm.compiler.lir.debug.IntervalDumper