21     static ref MAP_EMPTY: HashMap<char, u32> = HashMap::new();  constant
22     static ref MAP: HashMap<char, u32> = {  constant
218     static ref MAP_VEC_EMPTY: Vec<(char, u32)> = vec![];  constant
219     static ref MAP_VEC: Vec<(char, u32)> = vec![  constant
255     static ref MAP_EXISTING_EMPTY: HashMap<char, u32> = HashMap::new();  constant
256     static ref MAP_EXISTING: HashMap<char, u32> = {  constant
262     static ref MAP_EXTENSION_EMPTY: Vec<(char, u32)> = vec![];  constant
263     static ref MAP_EXTENSION: Vec<(char, u32)> = vec![('c', 30), ('e', 50), ('f', 60), ('d', 40),];  constant
315     static ref SET_EMPTY: HashSet<char> = HashSet::new();  constant
316     static ref SET: HashSet<char> = {  constant
381     static ref SET_VEC_EMPTY: Vec<char> = vec![];  constant
382     static ref SET_VEC: Vec<char> = vec!['b', 'a', 'c', 'e', 'f', 'd',];  constant
411     static ref SET_EXISTING_EMPTY: HashSet<char> = HashSet::new();  constant
412     static ref SET_EXISTING: HashSet<char> = {  constant
418     static ref SET_EXTENSION_EMPTY: Vec<char> = vec![];  constant
419     static ref SET_EXTENSION: Vec<char> = vec!['c', 'e', 'f', 'd',];  constant
471     static ref SET_A: HashSet<char> = ['a', 'b', 'c', 'd'].iter().copied().collect();  constant
472     static ref SET_B: HashSet<char> = ['a', 'b', 'e', 'f'].iter().copied().collect();  constant
473     static ref SET_DIFF_AB: HashSet<char> = ['c', 'd'].iter().copied().collect();  constant
474     static ref SET_DIFF_BA: HashSet<char> = ['e', 'f'].iter().copied().collect();  constant
475     static ref SET_SYMM_DIFF_AB: HashSet<char> = ['c', 'd', 'e', 'f'].iter().copied().collect();  constant
476     static ref SET_INTERSECTION_AB: HashSet<char> = ['a', 'b'].iter().copied().collect();  constant
477     static ref SET_UNION_AB: HashSet<char> =  constant