Swift Underscored Variable
 Swift Underscored Variable 
 Using conditionals inside template literals
Properties
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self._momentDate is the Binding<Date> struct itself.
self.momentDate, equivalent to self._momentDate.wrappedValue, is a Date. You would use this when rendering the date in the view's body.
self.$momentDate, equivalent to self._momentDate.projectedValue, is also the Binding<Date>. You would pass this down to child views if they need to be able to change the date.
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