1. Dart
2. dart:io
3. X509Certificate
4. startValidity property

X509Certificate class

1. Properties
2. der
3. endValidity
4. issuer
5. pem
6. sha1
7. startValidity
8. subject
9. hashCode
10. runtimeType
11. Methods
12. noSuchMethod
13. toString
14. Operators
15. operator ==

DateTime get startValidity;