ProcessInfo constructor Null safety

1. Dart
2. dart:io
3. ProcessInfo
4. ProcessInfo constructor

ProcessInfo class

1. Constructors
2. ProcessInfo
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static properties
12. currentRss
13. maxRss