public JCDiagnostic fragment(String key,Object... args){
  return create(FRAGMENT,null,EnumSet.noneOf(DiagnosticFlag.class),null,null,key,args);
}

public JCDiagnostic fragment ( String key , Object ... args ) { return create ( FRAGMENT , null , EnumSet . noneOf ( DiagnosticFlag . class ) , null , null , key , args ) ; }
create a fragment diagnostic , for use as an argument in other diagnostics
