https://lucene.apache.org/lucene-parent/lucene-core: Apache Lucene Java Core (The Apache Software Foundation) 
public interface org.apache.lucene.analysis.tokenattributes.KeywordAttribute 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.KeywordAttribute
  super_class: java.lang.Object
{
  public abstract boolean isKeyword();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void setKeyword(boolean);
    descriptor: (Z)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
           Name  Flags
      isKeyword  
}
SourceFile: "KeywordAttribute.java"