In the previous chapter, you learned that entities do not exist in isolation. You saw some examples of inheritance. You will see more in a minute, although in different forms.
There are a few more types of relationships between classes. A relationship between each class is always defined beforehand so that we don’t have to use same code again and again. Like C#, PHP, Python, and Java, in Dart, the classes in a program can be related to each other. Identifying and establishing the relationships between them is an important ...
