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:

class Notebook $\{$

$//$ Properties

private var notes: $[$String: Note$]=[$:$]$

$//$ Subscript

subscript$($id: String$)->$ Note? $\{$

get $\{$ return notes$[$id$]\}$

set $\{$ notes$[$id$]=$ newValue $\}$

$\}$

$//$ Methods

func add$($note: Note$)\{$

notes$[$note$.$id$]=$ note

$\}$

func remove$($id: String$)->$ Note? $\{$

return notes.removeValue$($forKey: id$)$

$\}$

func getAllNotes$()->[$Note$]\{$

return Array$($notes$.$values$)$

$\}$

func count$()->$ Int $\{$

return notes.count

$\}$

$\}$

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. If I've done anything wrong on that end so far, please do correct it as part of the final product you dish out. Thank you.