while (hasFurtherTokens() && !packageDefinitionFound() && !tooLateForPackageStatement()) {
        advance()
    }

    if (packageDefinitionFound()) {
        advance()
        skipWhiteSpaceAndComments()
        return parseQualifiedName()
    }

    return null
}


private
fun KotlinLexer.hasFurtherTokens() = tokenType != null


private