What does the $\_\_$str$\_\_()$ method of the Dog class in the following Python code do$?$

class Pet$()$:

def $\_\_$init$\_\_($self$)$:

self.name $=""$

self.color $=""$

def feed$($self$,$ food, cups$=1)$:

print$($self$.$name $+"$ ate $"+$ cups $+"$ cups of $"+$ food $+".")$

def $\_\_$str$\_\_($self$)$:

attributes $=""$

attributes $+=$ "Name: $"+$ self.name $+"$

$"$

attributes $+=$ "Color: $"+$ self.color $+"$

$"$

return attributes

class Dog$($Pet$)$:

def $\_\_$init$\_\_($self$)$:

super$().\_\_$init$\_\_()$

self.leash$\_$size $=""$

def $\_\_$str$\_\_($self$)$:

attributes $=$ super$().\_\_$str$\_\_()$

attributes $+=$ "Leash size: $"+$ self.leash$\_$size $+"$

$"$

return attributes