https://lucene.apache.org/lucene-parent/lucene-core: Apache Lucene Java Core (The Apache Software Foundation) 
public abstract class org.apache.lucene.index.ImpactsEnum extends org.apache.lucene.index.PostingsEnum implements org.apache.lucene.index.ImpactsSource
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: org.apache.lucene.index.ImpactsEnum
  super_class: org.apache.lucene.index.PostingsEnum
{
  protected void <init>();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.lucene.index.ImpactsEnum this
         0: .line 27
            aload 0 /* this */
            invokespecial org.apache.lucene.index.PostingsEnum.<init>:()V
            return
        end local 0 // org.apache.lucene.index.ImpactsEnum this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/lucene/index/ImpactsEnum;
}
SourceFile: "ImpactsEnum.java"