# Global list of conditional importation rules.
	#
	# Each rule is a "Horn clause"-like sequence of modules.
	# It means that the first module is the module to automatically import.
	# The remaining modules are the conditions of the rule.
	#
	# Rules are declared by `build_module_importation` and are applied by `apply_conditional_importations`
	# (and `build_module_importation` that calls it).
	#
	# TODO (when the loader will be rewritten): use a better representation and move up rules in the model.
	var conditional_importations = new Array[SequenceRead[MModule]]