Return the value associated to the keys k1, k2, k3 and k4.

Return null if no such a value.

Property definitions

more_collections $ HashMap4 :: []
	# Return the value associated to the keys `k1`, `k2`, `k3` and `k4`.
	# Return `null` if no such a value.
	fun [](k1: K1, k2: K2, k3: K3, k4: K4): nullable V
	do
		var level1 = self.level1
		var level2 = level1.get_or_null(k1)
		if level2 == null then return null
		return level2[k2, k3, k4]
	end
lib/more_collections/more_collections.nit:260,2--268,4