# Collect all `TComment` between `from` and `to`.
	fun collect_comments(from: nullable ANode, to: nullable ANode): Array[TComment] do
		var res = new Array[TComment]
		if from isa Prod then from = from.first_token
		if to isa Prod then to = to.first_token
		if from == null or to == null then return res

		while from != to do
			if from isa TComment then res.add from
			from = from.as(Token).next_token
		end

		return res
	end