Properties
Private #container
#container: null | HTMLElement
Private #customFormationCallback
#customFormationCallback: null | CallableFunction = null
Private #hidden
#hidden: boolean = true
Private #latlng
#latlng: LatLng = ...
Private #visibleSubMenu
#visibleSubMenu: null | string = null
Private #x
#x: number = 0
Private #y
#y: number = 0
the ID of the HTML element which will contain the context menu