Create a public class named Restaurant.
Restaurant should store two pieces of data: a name (as a String) and a capacity (as an int).
Provide a public constructor that allows both fields to be set, with the name first.
Following the encapsulation pattern we have introduced, provide both a setter and a getter for the capacity as
getCapacity and similar.
Provide only a getter for the name as getName.
Finally, reject negative and zero capacity values and null names using assert.
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