https://lucene.apache.org/lucene-parent/lucene-core: Apache Lucene Java Core (The Apache Software Foundation) 
public interface org.apache.lucene.analysis.tokenattributes.TermFrequencyAttribute extends org.apache.lucene.util.Attribute
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.apache.lucene.analysis.tokenattributes.TermFrequencyAttribute
  super_class: java.lang.Object
{
  public abstract void setTermFrequency(int);
    descriptor: (I)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
               Name  Flags
      termFrequency  

  public abstract int getTermFrequency();
    descriptor: ()I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "TermFrequencyAttribute.java"