deferred class
	WEL_COMMAND

General
	cluster: wel.support
	description: "General notion of command. To write an actual command inherit from this class and implement the `execute' feature."

Ancestors
	ANY

Queries
	message_information: WEL_MESSAGE_INFORMATION

Commands
	execute (argument: ANY)
	set_message_information (mi: WEL_MESSAGE_INFORMATION)