You have created the following class called Dog:

public class Dog $\{$

private String name;

private String breed;

public String getName$()\{$

return name;

$\}$

public void setName$($String name$)\{$

this.name $=$ name;

$\}$

public String getBreed$()\{$

return breed;

$\}$

public void setBreed$($String breed$)\{$

this.breed $=$ breed;

$\}$

$\}$

How would you use aggregation in a DogWalker class to show that a dog walker has one or more dogs?