default <T>void forEachMatchingFieldNameWithString(String regex,BiConsumer<String,String> function){
  forEachMatchingFieldNameWithString(Pattern.compile(regex),1,function);
}

default < T > void forEachMatchingFieldNameWithString ( String regex , BiConsumer < String , String > function ) { forEachMatchingFieldNameWithString ( Pattern . compile ( regex ) , 1 , function ) ; }
for all fields whose names match the given regular expression , extract a string value from the first group in the regular expression and call the supplied function .
