class
	HEADER

General
	cluster: net.mail
	description: "Objects that contains all the information relative to any header. Headers can only have email addresses informations."
	create: make_with_entries, make

Ancestors
	ANY

Queries
	entries: ARRAYED_LIST [STRING]
	multiple_entries: BOOLEAN
	unique_entry: STRING

Commands
	add_entries (list: ARRAY [STRING])
	add_entry (s: STRING)
	enable_contains_addresses
	enable_multiple_entries
	make (item: STRING)
	make_with_entries (list: ARRAY [STRING])
	remove_entry (entry: STRING)
	remove_i_th_entry (i: INTEGER)