BasicPaneUtils.toTransparency=Rx.map(function(v)return 1-v end)
--[=[
	Convert percentVisible observable to transparency

	@function toTransparency
	@param source Observable<number>
	@return Observable<number>
	@within BasicPaneUtils
]=]
BasicPaneUtils.toTransparency = Rx.map(function(value)
	return 1 - value
end)
