# How many bytes should be removed for CSV unescaping ?
	private fun chars_to_unescape_csv(delim_char: Char): Int do
		var pos = 0
		var to_un = 0
		var ln = length
		while pos < ln do
			var c = self[pos]
			if c == delim_char then
				pos += 1
				to_un += 1
			end
			pos += 1
		end
		return to_un
	end