I am looking to create a set of code which meets all of the requirements listed in the picture given below. Here's what I have so far:

struct Note $\{$

$//$ Nested Enum for Priority Levels

$$enum PriorityLvl: Int $\{$

$$case low $=1$

$$case medium

$$case high

$$mutating func incrementLvl$()\{$

$$if self.rawValue $$ PriorityLvl.high.rawValue $\{$

$$self $=$ PriorityLvl$($rawValue: self.rawValue $+1)!$

$\}$

$\}$

$$mutating func decrementLvl$()\{$

$$if self.rawValue $>$ PriorityLvl.low.rawValue $\{$

$$self $=$ PriorityLvl$($rawValue: self.rawValue $-1)!$

$\}$

$\}$

$\}$

$//$ Properties

$$let id: String

$$var priority: PriorityLvl

$$var body: String

$//$ Initializer

$$init$($id: String $=$ UUID$().$uuidString, priority: PriorityLvl $=.$low, body: String $=$ "New Note"$)\{$

$$self$.$id $=$ id

$$self$.$priority $=$ priority

$$self$.$body $=$ body

$\}$

$//$ Methods

$$mutating func updateBody$($newBody: String$)->$ String $\{$

$$self$.$body $=$ newBody

$$return self.body

$\}$

$$func toString$()->$ String $\{$

$$return $"\backslash ($priority$)$: $\backslash ($body$)"$

$\}$

$\}$

Can you please make whatever additions$/$modifications needed to the code to ensure it meets all requirements laid out in the photo and operates correctly? Just to be clear, this means down to every last detail given in those instructions, as to make sure it all matches up in the end. Thank you.