Where method calls can be used

You can call a method in any context in which the value returned by the method is valid. For example, in an Input action you can set the Row value to the integer value returned by a method, such as:
$importedVar.calculateRow()$

Also, you can use the Perform action to call a method when you do not need the return variable of the method or when the method has no return value (void) (see Perform action (<perform> element)).