Flutter for Beginners

Library member privacy

The most common way to control privacy (code encapsulation), in most languages, happens at the class level. This is by adding some specific keyword that identifies the member level of access, such as protected and private in the Java language. For example, consider the following diagram:

In Dart, every identifier, by default, is accessible from any place, inside and outside the library, except if it is prefixed with an _ (underscore) character. This means that it becomes private to the declaring libraries, preventing it from being accessible from the outside. Take a look at the next example, where we have used the