040000 tree 2983a3c1d5921768c750eb19b5406b3c6303e073	cluster_struct_attribute
040000 tree f511b342368805ceb358ba74b74fa49bb0b756f9	global_struct_attribute
040000 tree 7c6c0da63e6906d35aba25f3071a9a038d92909f	optional_argument
040000 tree a348bc09e0e0cd75ee56946ffa781e42f11c71c3	several_clusters
040000 tree f6c1ba56319d481c74b770554a3c85415daa0781	simple_attribute