a_star :: PathContext :: is_blocked
	# Is that link blocked?
	fun is_blocked(link: L): Bool is abstract
					lib/a_star/a_star.nit:349,2--350,42
				
	redef fun is_blocked(l) do return false
					lib/a_star/a_star.nit:371,2--40
				
	redef fun is_blocked(l) do return false
					lib/a_star/a_star.nit:400,2--40
				
	redef fun is_blocked(link) do return false
					lib/a_star/tests/test_a_star.nit:291,2--43