https://openjdk.java.net/ 
public interface com.sun.org.apache.bcel.internal.generic.IndexedInstruction
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.org.apache.bcel.internal.generic.IndexedInstruction
  super_class: java.lang.Object
{
  public abstract int getIndex();
    descriptor: ()I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void setIndex(int);
    descriptor: (I)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      index  
}
SourceFile: "IndexedInstruction.java"