Create a class named Restaurant. Restaurant should define a primary single constructor that accepts three fields: a String? (the name), a String? (the cuisine) and an Int (the capacity). You are welcome to name these fields however you like, and they should be private. Your constructor should reject null names and cuisines and negative or zero capacities.

You do not need to provide any getters and setters! Instead, define a single method named equals. Your equals method accepts an Any? as a single parameter. It should return true if the passed object is a Restaurant and has the same values for the name and cuisine, and false otherwise.