fromBase64 method
Decodes the string from Base64.
Returns null if the string is not a valid Base64 string.
Example:
"SGVsbG8=".fromBase64(); // Returns "Hello"
"invalid".fromBase64(); // Returns null
Implementation
String fromBase64() {
if (isEmpty) return '';
try {
return utf8.decode(base64Decode(this));
} catch (_) {
return '';
}
}