https://openjdk.java.net/ 
public interface com.sun.xml.internal.org.jvnet.fastinfoset.sax.ExtendedContentHandler extends org.xml.sax.ContentHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.xml.internal.org.jvnet.fastinfoset.sax.ExtendedContentHandler
  super_class: java.lang.Object
{
  public abstract void characters(char[], int, int, boolean);
    descriptor: ([CIIZ)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws org.xml.sax.SAXException
    MethodParameters:
        Name  Flags
      ch      
      start   
      length  
      index   
}
SourceFile: "ExtendedContentHandler.java"