http://lucene.apache.org/lucene-parent/lucene-core: Apache Lucene Java Core (The Apache Software Foundation) 
public interface org.apache.lucene.util.Accountable
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.apache.lucene.util.Accountable
  super_class: java.lang.Object
{
  public abstract long ramBytesUsed();
    descriptor: ()J
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public java.util.Collection<org.apache.lucene.util.Accountable> getChildResources();
    descriptor: ()Ljava/util/Collection;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.lucene.util.Accountable this
         0: .line 41
            invokestatic java.util.Collections.emptyList:()Ljava/util/List;
            areturn
        end local 0 // org.apache.lucene.util.Accountable this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/lucene/util/Accountable;
    Signature: ()Ljava/util/Collection<Lorg/apache/lucene/util/Accountable;>;
}
SourceFile: "Accountable.java"