public String toString(){
  StringBuilder sb=new StringBuilder();
  sb.append(hasSystem() ? getSystem() : "SYSTEM");
  sb.append("_");
  sb.append(hasSite() ? getSite() : "SITE");
  sb.append("_");
  sb.append(getName());
  return sb.toString();
}

public String toString ( ) { StringBuilder sb = new StringBuilder ( ) ; sb . append ( hasSystem ( ) ? getSystem ( ) : "SYSTEM" ) ; sb . append ( "_" ) ; sb . append ( hasSite ( ) ? getSite ( ) : "SITE" ) ; sb . append ( "_" ) ; sb . append ( getName ( ) ) ; return sb . toString ( ) ; }
default display string for this channel : system_site_name
