mak:      "newSparseMapPos(%s)",
			resize:   "", // larger-sized sparse maps are ok
			clear:    "%s.clear()",
			minLog:   5,
			maxLog:   32,
		},
	}
	deriveds := []derived{
		{
			name: "BlockSlice",
			typ:  "[]*Block",
			base: "ValueSlice",
		},
		{
			name: "IntSlice",
			typ:  "[]int",
			base: "Int64Slice",
		},
		{
			name: "Int32Slice",
			typ:  "[]int32",
			base: "Int64Slice",