private void Colon() throws SyntaxException {
        if (checkTokens(iterator.current(), Token.Type.COLON)) {
            nextToken();
        } else {
            throw (InvalidTokenException) new InvalidTokenException(
                iterator.current(),
                Token.Type.COLON
            )
            .initPosition(iterator.current().coordinates().starting())
            .Log("ru.bmstu.iu9.compiler.syntax");
        }
    }