What is Dart part?

Note: You may have heard of the part directive, which allows you to split a library into multiple Dart files . We recommend that you avoid using part and create mini libraries instead.

part and part of are to split a library into multiple files, not a class . Private (identifiers starting with _ ) in Dart is per library which is usually a *.

Darts consist of four parts, the barrel, flight, shaft and tip , and they can be exchanged depending on your preferences and play style.