code: private void parseImport() {
          tokenizer.consumeExpectedKeyword(KEYWORD_IMPORT);
          if (!tokenizer.current().isString()) {
              tokenizer.addError(tokenizer.current(),
                                 "Unexpected token: '"
                                 + tokenizer.current().getSource()
                                 + "'. Expected a string constant naming an import file.");
          } else {
              result.addImport(tokenizer.consume().getContents());
          }
          tokenizer.consumeExpectedSymbol(";");
      }
docs: /*
  Parses an import statement like "@import 'test';"