isValidFilePath method
Implementation
bool isValidFilePath() {
// Ensure it contains a valid separator, but not JUST a separator
if (trim().isEmpty) return false; // Empty string is invalid
if (endsWith("/") || endsWith("\\")) {
return false; // Ends with "/" or "\" is invalid
}
if (!contains(Platform.pathSeparator)) {
return false; // Must contain at least one "/"
}
return true; // Otherwise, it's a valid path
}