How do you send a function as a parameter in darts?

A function can take parameters which are just values you supply to the function so that the function can do something utilising those values. These parameters are just like variables except that the values of these variables are defined when we call the function and are not assigned values within the function itself.

Dart function as parameter A Dart function can be passed to other functions as a parameter. Such a function is called a higher-order function. In the example, the apply function takes the inc and dec functions as parameters. We specify that the second parameter is a function type.

Dart: How to pass a function into a function (using a Function as a method parameter)