code: public final String unquoted_string() throws RecognitionException {
          String value = null;
  
  
          Token STRING5=null;
  
          try {
              // C:\\Project\\Obdalib\\obdalib-parent\\obdalib-core\\src\\main\\java\\it\\unibz\\inf\\obda\\gui\\swing\\utils\\MappingFilter.g:92:3: ( STRING )
              // C:\\Project\\Obdalib\\obdalib-parent\\obdalib-core\\src\\main\\java\\it\\unibz\\inf\\obda\\gui\\swing\\utils\\MappingFilter.g:92:5: STRING
              {
              STRING5=(Token)match(input,STRING,FOLLOW_STRING_in_unquoted_string267); 
  
               value = (STRING5!=null?STRING5.getText():null); 
  
              }
  
          }
          catch (RecognitionException re) {
              reportError(re);
              recover(input,re);
          }
  
          finally {
          	// do for sure before leaving
          }
          return value;
      }
docs: C:\\Project\\Obdalib\\obdalib-parent\\obdalib-core\\src\\main\\java\\it\\unibz\\inf\\obda\\gui\\swing\\utils\\MappingFilter.g:91:1: unquoted_string returns [String value] : STRING ;