040000 tree 0d30d9d78a67718fe60ab658ffaaeb0cebf7d970	cluster_struct_attribute
040000 tree ecd82388ef12ae0c9ae443393b63be9ee99a969a	global_struct_attribute
040000 tree c56de988b21cd897f1683ed466e04f60ec8fe2f9	optional_argument
040000 tree 2f24a90a6ff0d72bc5f27d6eaac549aa62d7d1d3	several_clusters
040000 tree f3f1b4b8612c507c6cb2b04dc7f80d2a25fdd1ae	simple_attribute